Polyurethane boards M330 measure 1500x500x50mm and cost £75 (1p per 10mm square)

Low density polyurethane boards M80 are 100mm thick and cost 1p per 10mm square

The materials with the higher code numbers have higher densities, achieved by the use of fillers.

Higher density boards are better for fine details, i.e. 2mm houses at 1:5000.

The milling machine can cut to a maximum size of 1000mm x 600mm x 200mm tall (14/2/2023).