3M 6" 251U GREEN CORPS D/F "E" WEIGHT SANDPAPER DISCS - 3M Green Corps Stikit Dust-Free Production Discs 251U are prepunched with a standard hole pattern for dust-free sanding and are designed to be used with 3M Stikit Dust-Free Disc Pads. 3M Green Corps Stikit Dust-Free Discs have a pressure-sensitive adhesive backing for easy application and removal. Disc is 6" x 6H. Product is sold by the disc. 100 discs per box. 5 boxes per case.