The floorboards are basically available in 2 sizes:
1) Z25: 500x500x20 mm
2) Z36: 600X600X30 mm

The Z25 model can have a solid or a perforated surface. In this second case, the holes can be round or oval.

The Z36 model, perforated version only, can be supplied with a 600x150x30-mm slide.