Material:sponge Abrasive:silicon carbide Character:flexible and soft,ideal for dry or wet grinding and can be reuse abrasive sponge block, sponge sanding block, abrasive polishing blocks Material:spongeAbrasive: silicon carbideCharacter: flexible and soft, ideal for dry or wet grinding and can be reusable after washing.Application:suitable for special surfaces of metal, paint, wood, plastic for ...