2 hp, 33.CP Straight Grinder, 3 in Wheel Diameter, 3/8 in Arbor/Shank, 18000 rpm Speed, 1.3 in L Dimensions.92 cfm Air Flow, 3/8 in Air Inlet, Rear Load Exhaust Location, 3/8 in Minimum Hose, Steel Housing Material, 88 dB Power/77 dB Pressure Sound Level, 13.