FEATURES Smooth, Reliable and Powerful. 5 mm Diameter Orbit Brand Name Zipp Air Tool USA Item model number ZP354-5 Net Weight 1.8 lbs (0.8 kgs) Pad Size 5 (127) Free Speed 12,000 R.P.M Avg. Air Cons. 2.5 cfm (70.8 l/min) Operating Air Pressure 90 PSI(6.2 bar) Air Inlet Size 1/4 inch-NPT/PT Min.Hose Size 3/8 (10) inch(mm) Sound Pressure 82 dB(A)