Pure waterjet aluminium combs can have a comb size between 6 and 9 mm and a height between 20 and 50 mm. They are supplied in the size 2,500 x 1,250 mm or in custom sizes. Aluminium comb plates are laid directly on the gratings or inserted in the workpiece support frames.

Plastic combs are primarily used for cutting light materials such as mats, laminates, foams, textiles, leather, sealing materials, etc. as well as for sensitive materials, for which no waterjet reflection may occur. They are also used where very small cut-outs are made and these must not fall through.