uxcell 100x32mm 75% Concentration 800 Grit Resin Bonded Diamond Grinding Wheel Product Name : Diamond Grinding Wheel;Type : Bowl Shape;Main Material : Aluminum, Resin Abrasive Grain : JR;Bonding Agent : S2;Concentration : 75% Grit : 800;Outside Diameter : 100mm / 3.9";Mounting Hole Dia. : 20mm / 51/64" Rim Dimension : 10 x 3mm / 0.39" x 0.12" (W*T);Overall Depth : 32mm / 1.26";Color : Green, Silver Tone Net Weight : 262g;Package Content : 1 x Diamond Grinding Wheel