312A Features: -Air Orbital Sander.-Low vibration plus longer-life.-Automatic release throttle lever with positive stop action.-Built-in regulator for positive speed control.-Positive locking clamps.-Average Air Consumption: 6 cfm.-Air Inlet: 1/4".-Performance Rating: Heavy Duty.-@ Load: 12 cfm.-Min Hose Size: 3/8".-Pad Diameter: 3-2/3" x 6-3/4" Rectangular Pad Size.-Vacuum Ready: No.-Free Speed: 8000 rpm. Construction: -Balanced ball bearing construction. Specifications: -Sound (Pressure/Power): 94.1/107.1 dBA.-Rated Power: 0.3 hp. Dimensions: -Weight: 4.6 lbs.