Detailed Product Description 1-Abrasives grains: Aluminium Oxide,Silicon Carbide,Zirconia Oxide,Re-enforced Aluminium Oxide2-Grains grit: 36,40,60,80,120,150,180,240,320,400,3-Bonding:Resin over resin4-Version type:Flat type5-Size:2",2.5",3"(50,62,75mm)6-Screw nut size:8mm7-Backing:re-enforced T/C clothing