A&H Abrasives 960030, Sanding Accessories, Hand, Thin Sanding Sponge-Fine, 5-pack Sanding sponges are ideal for contour sanding. Specifications: Width=4-1/2 in, Length=5-3/4 in, Thickness=3/16 in Specifications: Grit=FINE, Abrasive=ALUMINUM OXIDE