€¢ Includes 3-Inch , 45-Inch and 55-Inch sanding disks €¢ High Speed Pneumatic sander €¢ Air requirement: 40 @ 90PSI €¢ Air inlet: ¼€ NPT RPM: 18,000 >> Comfortable in your hand and built to last, Bolton Air by Toolway is your first choice for all your pneumatic air tools needs.