Injection-moulded from ABS plastic — the same family of materials used in LEGO bricks. ABS does not warp, holds its shape over time, and bonds reliably with superglue (cyanoacrylate) and two-part epoxy. The textured top surface grips PVA, texture paste, and basing sand without needing to score or rough up the surface first. Takes all spray and brush-on primers cleanly.

Every mould in the OBS range is designed in-house using industry-standard CAD — these are not generic imports. We control the full production chain from design through to quality control. Mould lines are clean and consistent.

Dimensional accuracy is critical for square bases — they need to rank up edge-to-edge without gaps or overlap. The 30mm outer width matches nominal sizing exactly. The 1.4mm floor gives a solid, rigid base, and 2.4mm of underside clearance fits 3x2mm disc magnets for magnetic tray use.

30mm square is used for larger infantry, heavy troops, and characters in mass-battle wargaming systems that specify a 30mm square footprint. Also useful for hobbyists who want a slightly bigger canvas than 25mm for scenic basing on ranked models.

These bases rank up edge-to-edge and fit standard 30mm square movement trays. OBS square-to-round converters are available if you need to switch between game systems.

Part of the Open Basing System (OBS)

One Ecosystem · Every Size · Every Shape

OBS is a modular basing ecosystem designed as a whole — not a random collection of bestsellers. Every size, shape, converter, and tray is planned to work together. Independent and gamer-built.

New products added regularly — the OBS range is always growing.

Square bases are built to sit edge-to-edge. Keep texture materials away from the edges so bases rank up flush. A clean rim painted in a uniform colour gives your ranked units a tidy, cohesive block appearance.

Wash before priming — a quick rinse in warm soapy water removes mould release residue. Batch-prime on a strip of tape for efficiency when doing a full regiment.

Superglue (cyanoacrylate) bonds ABS well. The textured top grips PVA, basing paste, and sand without sliding. For metal models, score the base lightly with a hobby knife for a stronger bond.

2.4mm underside clearance fits 3x2mm disc magnets. Magnetising a regiment makes movement trays effortless — pick up and move entire blocks at once. CA gel, check polarity consistently across the unit.