Durable Alloy Housing,Compact and Lightweight Design for Single Hand Operation Nodular Cast Iron Cylinder for High Wear Resistance. Rear Exhaust Outlet Directs Exhaust Air Away From the Work Piece High Density Powder Metallurgy Rotor with Vacuum Oiled Blades Wear Proof Professional 5"Sander Orbital Dia is 5mm,10,000 RPM Free Speed for Swirl free Finishes.Hook and Loop pad　 POWER AERO NOVIA Provide professional polishing and grinding tools.Suitable for all sanding work such as auto body, furniture,hardware and machinery,electronic application,fiber glass and metal items,removing rust and surface preparation before painting. ITEM NO:NV614-5 Operating Pressure:90 psi (6.3 bar) Free Speed:10,000 rpm Air Consumption:4cfm Orbital dia:3/16 Size of pad:5" 125mm Type of pad:Hook and Loop Air Inlet Size:1/4" Net Weight:2.1lbs. (0.95kg)