Resin Diamond Polishing System with polyester backing, wear resistant joint, a flexible belt, wet use only.Our premier line of resin bond belts offers an aggressive solution to your cutting and polishing needs,Diamond Belts For Expanding Drums is resin bonded giving a nice smooth finish, especially after working a few stones. Our professional people tell us they are the longest lasting belts they have ever used. In fact, under normal use, our belts will last 50 to 100 times longer than silicon carbide abrasives! Of course, we back these belts with our 100% satisfaction guarantee. 6"x1.5" Diamond Resin Sanding Belt belts is 1.5" width x 18-15/16" Length suit for 6"x1.5" Expandable Rubber Drum 6"x2.5" Diamond Resin Sanding Belt belts is 2.5" width x 18-15/16" Length suit for 6"x2.5" Expandable Rubber Drum 8"x3" Diamond Resin Sanding Belt belts is 3" width x 25-7/32" Length suit for 8"x3" Expandable Rubber Drum