The hollow base range laid out together: round, square, oval and rectangle bases, each with a recessed top.

Hollow Bases Range - Wargaming 3d Printed Bases (OBS System)

20mm Round Hollow Bases x1 pc
£2.09
£2.09
Skip to product information
The hollow base range laid out together: round, square, oval and rectangle bases, each with a recessed top.
  • The hollow base range laid out together: round, square, oval and rectangle bases, each with a recessed top.
  • The hollow base range laid out together: round, square, oval and rectangle bases, each with a recessed top.
  • The hollow base range laid out together: round, square, oval and rectangle bases, each with a recessed top.
  • Diagram of the Open Basing System showing how bases, converters, movement trays, shape adapters and hero bases relate.
  • Technical drawing of the 20 mm round hollow base: 4 mm tall with a 3 mm recess.
  • A single black 3D-printed 20 mm round hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 20 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 20 mm round hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 20 mm round hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 20 mm round hollow bases with recessed tops, shown on a plain background.
  • 50 black 3D-printed 20 mm round hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 25 mm round hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 25 mm round hollow base: 4 mm tall with a 3 mm recess.
  • 3 black 3D-printed 25 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 25 mm round hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 25 mm round hollow bases with recessed tops, shown on a plain background.
  • 50 black 3D-printed 25 mm round hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 25 mm round hollow bases with recessed tops, shown on a plain background.
  • 50 black 3D-printed 25 mm round hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 28 mm round hollow base: 4 mm tall with a 3 mm recess.
  • A single black 3D-printed 28 mm round hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 28 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 28 mm round hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 28 mm round hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 28 mm round hollow bases with recessed tops, shown on a plain background.
  • 50 black 3D-printed 28 mm round hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 32 mm round hollow base: 5 mm tall with a 3 mm recess.
  • A single black 3D-printed 32 mm round hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 32 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 32 mm round hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 32 mm round hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 32 mm round hollow bases with recessed tops, shown on a plain background.
  • 50 black 3D-printed 32 mm round hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 40 mm round hollow base: 5 mm tall with a 4 mm recess.
  • A single black 3D-printed 40 mm round hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 40 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 40 mm round hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 40 mm round hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 40 mm round hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 50 mm round hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 50 mm round hollow base: 5 mm tall with a 4 mm recess.
  • 3 black 3D-printed 50 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 50 mm round hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 50 mm round hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 60 mm round hollow base: 5 mm tall with a 4 mm recess.
  • A single black 3D-printed 60 mm round hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 60 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 60 mm round hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 60 mm round hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 70 mm round hollow base: 5 mm tall with a 4 mm recess.
  • A single black 3D-printed 70 mm round hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 70 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 70 mm round hollow bases with recessed tops, shown on a plain background.
  • Technical drawing sheet supplied for the 80 mm round hollow base.
  • A single black 3D-printed 80 mm round hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 80 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 80 mm round hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 90 mm round hollow base: 6 mm tall with a 5 mm recess.
  • A single black 3D-printed 90 mm round hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 90 mm round hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 100 mm round hollow base: 6 mm tall with a 5 mm recess.
  • A single black 3D-printed 100 mm round hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 100 mm round hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 100 mm round hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 110 mm round hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 110 mm round hollow base: 6 mm tall with a 5 mm recess.
  • Technical drawing of the 120 mm round hollow base: 6 mm tall with a 5 mm recess.
  • A single black 3D-printed 120 mm round hollow base with a recessed top, shown on a plain background.
  • A single black 3D-printed 130 mm round hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 130 mm round hollow base: 6 mm tall with a 5 mm recess.
  • A single black 3D-printed 140 mm round hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 140 mm round hollow base: 6 mm tall with a 5 mm recess.
  • A single black 3D-printed 150 mm round hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 150 mm round hollow base: 6 mm tall with a 5 mm recess.
  • Technical drawing of the 160 mm round hollow base: 6.5 mm tall with a 5 mm recess.
  • A single black 3D-printed 160 mm round hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 175 mm round hollow base: 6.5 mm tall with a 5 mm recess.
  • A single black 3D-printed 175 mm round hollow base with a recessed top, shown on a plain background.
  • A single black 3D-printed 200 mm round hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 200 mm round hollow base: 7 mm tall with a 5 mm recess.
  • A single black 3D-printed 50 × 25 mm oval hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 50 × 25 mm oval hollow base: 4 mm tall with a 3 mm recess.
  • 3 black 3D-printed 50 × 25 mm oval hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 50 × 25 mm oval hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 50 × 25 mm oval hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 50 × 25 mm oval hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 50 × 35 mm oval hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 50 × 35 mm oval hollow base: 4 mm tall with a 3 mm recess.
  • 5 black 3D-printed 50 × 35 mm oval hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 50 × 35 mm oval hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 50 × 35 mm oval hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 60 × 35 mm oval hollow base: 4 mm tall with a 3 mm recess.
  • A single black 3D-printed 60 × 35 mm oval hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 60 × 35 mm oval hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 60 × 35 mm oval hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 60 × 35 mm oval hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 60 × 35 mm oval hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 75 × 42 mm oval hollow base: 5.1 mm tall with a 4 mm recess.
  • A single black 3D-printed 75 × 42 mm oval hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 75 × 42 mm oval hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 75 × 42 mm oval hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 75 × 42 mm oval hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 90 × 52 mm oval hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 90 × 52 mm oval hollow base: 5.1 mm tall with a 4 mm recess.
  • 3 black 3D-printed 90 × 52 mm oval hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 90 × 52 mm oval hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 90 × 52 mm oval hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 105 × 70 mm oval hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 105 × 70 mm oval hollow base: 5 mm tall with a 4 mm recess.
  • 3 black 3D-printed 105 × 70 mm oval hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 105 × 70 mm oval hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 120 × 92 mm oval hollow base: 5 mm tall with a 4 mm recess.
  • A single black 3D-printed 120 × 92 mm oval hollow base with a recessed top, shown on a plain background.
  • 2 black 3D-printed 150 × 95 mm oval hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 150 × 95 mm oval hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 170 × 105 mm oval hollow base: 6 mm tall with a 4 mm recess.
  • A single black 3D-printed 170 × 105 mm oval hollow base with a recessed top, shown on a plain background.
  • A single black 3D-printed 180 × 140 mm oval hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 180 × 140 mm oval hollow base: 7 mm tall with a 5 mm recess.
  • Technical drawing of the 20 mm square hollow base: 4 mm tall with a 3 mm recess.
  • A single black 3D-printed 20 mm square hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 20 mm square hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 20 mm square hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 20 mm square hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 20 mm square hollow bases with recessed tops, shown on a plain background.
  • 50 black 3D-printed 20 mm square hollow bases with recessed tops, shown on a plain background.
  • 3 black 3D-printed 25 mm square hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 25 mm square hollow base: 5 mm tall with a 3.6 mm recess.
  • 3 black 3D-printed 25 mm square hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 25 mm square hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 25 mm square hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 25 mm square hollow bases with recessed tops, shown on a plain background.
  • 50 black 3D-printed 25 mm square hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 30 mm square hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 30 mm square hollow base: 5 mm tall with a 3.6 mm recess.
  • 3 black 3D-printed 30 mm square hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 30 mm square hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 30 mm square hollow bases with recessed tops, shown on a plain background.
  • 25 black 3D-printed 30 mm square hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 40 mm square hollow base: 5 mm tall with a 3.6 mm recess.
  • A single black 3D-printed 40 mm square hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 40 mm square hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 40 mm square hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 40 mm square hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 50 mm square hollow base: 5 mm tall with a 3.6 mm recess.
  • A single black 3D-printed 50 mm square hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 50 mm square hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 50 mm square hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 50 mm square hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 60 mm square hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 75 mm square hollow base: 6 mm tall with a 5 mm recess.
  • A single black 3D-printed 75 mm square hollow base with a recessed top, shown on a plain background.
  • A single black 3D-printed 80 mm square hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 80 mm square hollow base: 6 mm tall with a 5 mm recess.
  • A single black 3D-printed 90 mm square hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 90 mm square hollow base: 6 mm tall with a 5 mm recess.
  • Technical drawing of the 100 mm square hollow base: 6 mm tall with a 5 mm recess.
  • A single black 3D-printed 100 mm square hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 110 mm square hollow base: 6.5 mm tall with a 5 mm recess.
  • A single black 3D-printed 110 mm square hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 125 mm square hollow base: 6.5 mm tall with a 5 mm recess.
  • A single black 3D-printed 125 mm square hollow base with a recessed top, shown on a plain background.
  • A single black 3D-printed 150 mm square hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 150 mm square hollow base: 6.5 mm tall with a 5 mm recess.
  • Technical drawing of the 175 mm square hollow base: 7 mm tall with a 5 mm recess.
  • A single black 3D-printed 175 mm square hollow base with a recessed top, shown on a plain background.
  • A single black 3D-printed 200 mm square hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 50 × 25 mm rectangle hollow base: 4 mm tall with a 3 mm recess.
  • A single black 3D-printed 50 × 25 mm rectangle hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 50 × 25 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 50 × 25 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 50 × 25 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 60 × 30 mm rectangle hollow base: 3.8 mm tall with a 2.8 mm recess.
  • A single black 3D-printed 60 × 30 mm rectangle hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 60 × 30 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 60 × 30 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 60 × 30 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 60 × 40 mm rectangle hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 60 × 40 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 60 × 40 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 60 × 40 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 75 × 50 mm rectangle hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 75 × 50 mm rectangle hollow base: 5 mm tall with a 4 mm recess.
  • 3 black 3D-printed 75 × 50 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 75 × 50 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 75 × 50 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • Technical drawing of the 100 × 50 mm rectangle hollow base: 5 mm tall with a 3 mm recess.
  • A single black 3D-printed 100 × 50 mm rectangle hollow base with a recessed top, shown on a plain background.
  • 3 black 3D-printed 100 × 50 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 100 × 50 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 100 × 50 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 100 × 60 mm rectangle hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 100 × 60 mm rectangle hollow base: 5 mm tall with a 4 mm recess.
  • 3 black 3D-printed 100 × 60 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 5 black 3D-printed 100 × 60 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • 10 black 3D-printed 100 × 60 mm rectangle hollow bases with recessed tops, shown on a plain background.
  • A single black 3D-printed 150 × 100 mm rectangle hollow base with a recessed top, shown on a plain background.
  • Technical drawing of the 150 × 100 mm rectangle hollow base: 5 mm tall with a 4 mm recess.
Hollow Bases Range - Wargaming 3d Printed Bases (OBS System)

Hollow Bases Range - Wargaming 3d Printed Bases (OBS System)

£2.09
£2.09
Taxes included. Shipping calculated at checkout.
Key Dimensions · This OptionØ 20.0 MM
Footprint 20.0 mm diameter
Overall height 4.0 mm
Top surface 18.89 mm diameter
Recess 15.71 mm across
Recess depth 3.0 mm
Material 3D-printed PLA

Designed to fit the 20mm round standard used in rank-and-file wargames. Base size requirements change between editions — check your game's current rules.

Open underside — glue on your own magnet (no fixed slot). See the technical drawing for usable space.

Closed floor 1 mm thick.

Number of packs
In stock

Same-day dispatch before 3pm Mon–Fri · Free UK delivery over £70 · 30-day returns

DWG · Product Information

PROJ: BAS/RO/HOL/20/1 · SHEET 2 / 4

View · Overview

Product overview

A base whose top is a shallow basin rather than a flat plate: a raised perimeter rim around a closed floor, so resin, UV gel or water effects pour straight in and the rim contains the liquid while it self-levels. No tape-and-plasticard dam, no sealing step. The range covers 53 size-and-shape combinations across round, square, oval and rectangle, from 20 mm to 200 mm, 3D printed to order in black PLA in the UK. Footprints follow Open Basing System standards, so these bases rank up in OBS movement trays and work with OBS converters, whether the army is mustered for Kings of War or the party is bound for Dungeons & Dragons.

  • The basin is a few millimetres deep — enough for swamps, rivers and lava pools without flooding the model's feet.
  • Pour in thin layers: a deep single epoxy pour cures hot, and PLA does not love heat.
  • Suits two-part epoxy resin, UV-cure gels and air-drying water-effect products alike, built up one thin layer at a time.
  • FDM printing leaves fine layer lines on the rim and sides — normal for the process, gone under primer, and the basin interior ends up under resin anyway.
  • Once the pour has cured, the base takes primer and paint like any other in the range.
  • Printed to order in the UK; we usually keep some stock, but we may need a while to process your order.

Compatible with popular tabletop miniatures; not affiliated with, endorsed by or produced by Games Workshop.

Notes · Q & A

Can I add magnets underneath OBS bases?

Check the selected option's underside opening and available underside depth in Technical Specifications before choosing magnets. Magnet fit depends on the actual cavity dimensions and the magnet you plan to use, so it should not be assumed to be the same across every base.

How do I choose the right base size?

Start with the base footprint required for your model or game, then confirm the selected option against the Technical Specifications. If you are replacing an existing base, measure it carefully and compare its physical footprint before ordering.

How should I use the technical drawing?

Choose your option first, then use the technical drawing and Technical Specifications to check the physical dimensions of the product. When matching an existing part or accessory, use the drawing rather than relying on the product name alone.

Can I rely on the nominal size alone?

No. Products with similar nominal sizes can have different physical dimensions or fit differently across brands and systems. Check the technical drawing, specifications and any product-specific compatibility note before ordering.

Notes · Logistics

Shipping

Orders placed before 3PM (Mon–Fri) are dispatched same day. Free UK delivery on orders over £70. International shipping available.

Returns

If you're not happy with your purchase, contact us within 14 days for a full refund or exchange. Items must be unused and in original packaging.

Table · Specification

Technical specifications

Product details
Brand
Hobby Heaven
Product code
BAS/RO/HOL/20/1
Type
Base
Shipping weight
25 g
Geometry
Footprint
Ø 20.0 mm
Overall height
4.0 mm
Top surface
Ø 18.89 mm
Recess
15.71 mm across
Recess depth
3.0 mm
Material & finish
Material
3D-printed PLA
Classification
Range
Bases

Product

Hollow Bases Range - Wargaming 3d Printed Bases (OBS System)

Code (proj)

BAS/RO/HOL/20/1

Ship. weight

25 g

Brand

Hobby Heaven

Hobby Heaven · Open Basing System

Sheet 2 / 4

End of sheet