3M SandBlaster Dual Angle Sanding Sponge, 320-Grit, 2.625-Inch by 4.5-Inch Sandblaster dual angle sanding sponge This between coats sponge features fine 320-grit construction Ideal for preparing freshly coated surfaces (wood, metal) prior to the next coat Long lasting and clog resistant, finishes faster Measures 4-1/2 inches length by 2-5/8 inches width by 1 inches height