3M SandBlaster™ Aluminum Oxide Sanding Sponge

3M™ SandBlaster™ sanding sponge 21907 320, 3-3/4 in x 2-1/2 in x 1 in, bulk. The 3M™ SandBlaster™ between coats sanding sponge is ideal for sanding between coats of finish on freshly coated surfaces, such as wood and metal. Use it to smooth surface imperfections prior to the first topcoat application. Block sanding sponges are recommended for flat or slightly contoured surfaces. 3M™ SandBlaster™ fine sanding sponges finish fast, last long and are clog-resistant.