HHIP orbital jitterbug type air sander. Constant orbital stroke for fine finishing. Dynamic counter weight for low vibration sanding. Automatic throttle release lever with positive stop. 8,000 RPM speed. .25-inches NPT air inlet. .375-inches hose size. 5 CFM air consumption. 90 PSI air pressure. Pad measures 6.5-inches length by 3.667-inches width.