Maxworks 60150 3-1/2-Inch by 7-3/4-Inch Jitterburgh Air Sander, 8000 RPM Pad Size: 3-1/2-Inchx7-3/4-Inch 8,000 RPM No load speed Air Consumption: 6 CFM Maximum air pressure: 90 PSI; Standard 1/4-Inch air inlet Minimum hose size: 3/8-Inch diameter;