Specification Recommended Air Pressure 6.5Kg/Cm2 (90 Psi) Model: Rp-27330 Avg. Air Consumption : 4.5Cfm (128.2L/Min) Free Speed : 10000Rpm Overall Length : 186.5Mm Air Intel : 1/4″ Working Pressure : 0.63Mpa Air Hose : 3/8″Id Net Weight : 0.94Kg Grinder Cap : 5 Or 6″