Maxworks 60149 6-Inch Air Dual Action Disc Sander, 10,000 RPM Disk Size: 6-Inch 10,000 RPM No load speed; Built-in regulator for speed control Air Consumption: 4 CFM Maximum air pressure: 90 PSI; Standard 1/4-Inch air inlet Minimum hose size: 3/8-Inch diameter