Also known as a mould (or mold) box. Used to create walls around an object during the mould making process.

Fabricate using 3mm acrylic stock. Solvent type acrylic glue is used to securely join one of each type of part (square, triangular and rectangular) to form a single wall unit. 4 wall units can be non-permanently secured together using M3 fittings or spring clamps. File contains parts to make 4 wall units. If your pour depth will exceed 20mm you will need to block any internally exposed bolt holes. Temporary sealant may be required on edges to prevent leakage of casting compound depending on viscosity/cure time.