... ,little weight,high power,little noise,operate safe SD-150 Face Air Grinding Wheel Air grinder ID ITEM UNIT ... 1 Wheel size(outer diameter×thickness×inner diameter) mm 150×6×22 2 Air pressure Mpa 0.63 3 ... contour size(outer diameter×thickness×inner diameter) mm180×66×150(1)This tool is portable face air grinding wheel, ... has a metal shield, for operation safety. SD-150 Face Air Grinding Wheel Air grinder