Features: 1) Built-in speed regulator 2) Complete with 3 resin fiber backing pads 3) Suitable for light sanding jobs, such as feathering, edging and rust removal Specifications: 1) Free speed: 18,000rpm 2) Air inlet: 1/4" 3) Air hose (ID): 3/8" 4) Average air consumption: 4cfm (115L/min) 5) Suggested air compressor: 2.0HP Inner packing: color box