uxcell 150 Grit 100mm Outside Dia 20mm Hole Bowl Shape 11C9 Diamond Grinding Wheel Product Name : Diamond Grinding Wheel;Model : 11C9;Shape : Bowl Shape Main Material : Allloy;Grit : 150;Outside Diameter : 100mm / 3.9" Mounting Hole Dia. : 20mm / 51/64";Rim Dimension : 10 x 5mm / 0.39" x 0.2" (W*T) Overall Depth : 35mm / 1.4";Color : Silver Tone Net Weight : 571g;Package Content : 1 x Diamond Grinding Wheel