1) Sanding pad: 5" (125mm) 2) Free speed: 10,000rpm 3) Air inlet: 1/4" (PT) 4) Air hose: 3/8" (ID) 5) Avg. air 1) Professional sander with unique ergonomic design2) Low vibration for swirl-free finishes3) Built-in regulator for positive speed control4) Constructed with heat treated steel components for long life5) 6'' sanding pad available6) Rear exhaust Air Sander