HHIP 2405-3876 3 x 7/8 x 1-1/4 Inch D11A2 Flaring Cup CBN Wheel Wheel Diameter 3"; Wheel Thickness 7/8 Diamond Depth 1/8; Rim Width 3/8 100% Concentration .Back Thick 3/8 Style D11A2 Arbor Hole: 1-1/4"; CBN (120 Grit)