Air Wet Sander Polisher: 1.Quality 2.Good Price 3.Fast Delivery Air Wet Sander Polisher: Used Air PressureGrinding Wheel SizeRotation SpeedN.WRemark6.3 Kg/cm²4"4500 rpm1.4 kgBackseat air exhaust The air wet sander/polisher is a versatile cutter,which can be used for any hard material and any profile to sand the uneven surface,especially,ideal to sand the marble,stone,construction material etc.