ltra premium German made Starcke Madator brand. Plain backed, closed coat, flexible A-weight backing. Black colored Silicon Carbide waterproof paper sheets are ideal for hand sanding wet or dry applications with a clean finish and reduced loading. Starcke brand material provides a high strength product, a solid finish with a long working life Performs especially well on solid surfaces. Use in wet/dry applications. This product features an anti-clogging stearate which provides better sanding and a cleaner working environment.