Sioux 697 6" Air Finishing Sander - .40HP, Dual Action, Lever Thrtl, 10K RPM, 3/16" Orbit Diameter Ergonomic Design For Comfort And Control. Random Orbital Design: Swirl-Free Sanding. Specifications: Hose Connection Npt 1/4", Recommended Psi 90, Speed (Rpm) 10,000, Net Weight 2.9 Lbs., Maximum Air Consumption 20 Cfm, Horsepower .4Hp Good For Horizontal Sanding!