Features: The AirPowered Function Could Reduce Dust And Improve Environment Protection, Poses No Electric Hazards, And The Side Exhaust Keeps Exhaust Away From Your Stone. Suede Sandpaper Can Stick To Grinding Disc, You Can Choose Sandpaper In Different Grit. Low Vibrate And Noise With Excellent Performance. Light Weight And NonSlip Handle Design For Comfortable Grip. Widely Used In Marble, Granite And Other Stone Material Polishing Work. Specification: Working Pressure: 6-8Mpa Inlet Size: 1/4" Weight: Approx.1638G/ 57.8Oz NoLoad Speed: 4300Rpm Suitable Gas Pipe: 8*5Mm/ 0.3*0.2In Grinding Disc Dia.: 75Mm/ 3In Package List: 1 * Air Polisher 1 * 1/4" Inlet Connector 1 * Hose 1 * Water Pipe 1 * Grinding Disc Note: Please Allow Slight Error Due To Manual Measurement. Thanks For Your Understanding.