DIAMETER ORBIT : 3.2 FREE SPEED : 10,000 (R.P.M.) AIR HOSE : 3/8″ (I.D.) AIR INLET : 1/4″ OVERALL LENGTH: 8.7″ (220MM) AIR CONSUMPTION : 9 CFM / 255 L/MIN NET WEIGHT : 1.5 LBS / 0.7 KG PACKING : 12PCS/CTN/9KGS/2.0′