This NSK Air Motor is assembled with high quality ball bearings enabling higher grinding power at a maximum speed of 58,000 rpm. Suitable for very precise processing works. • Motor Speed: 58,000 rpm (85PSI)• Forward Rotation: CW• Proper Air Pressure: 56~85PSI• Air Consumption: 5.65CFM• Length of Motor Hose: 6 ft Standard• Hose Diameters: Air Intake I.D. ø4.5 mm x O.D. ø6.7 mm; Exhaust Air I.D. ø5.5 mm x O.D. ø7.5 mm• Weight (w/o hose): 7.58 oz.• NSK Catalog Number: AS11071Included Equipment:• Hose (K-204): 6 ft.• Silencer (K-208)• Wrench (20 x 24): 1 pc.