This pack of 230 x 280mm wet and dry sanding sheets (400 grit) are waterproof and designed to minimise clogging. They are made from latex backed silicon carbide, that is resin bonded for a more aggressive cut via advanced electrostatic coating process which improves efficiency. The C-Weight backing paper makes them pliable and strong - able to be used in folded and flat areas. Ideal for automotive sanding, sanding wood furniture and finishing wood and metal. Suitable for hand sanding and compatible with most hand sanding blocks.