Air Finishing Sander Product Type Extended Finishing Tool Abrasive Orientation Inline Minimum Drum or Wheel Diameter 3 1/4 in Maximum Drum or Wheel Diameter 3 1/4 in Horsepower 1 hp Duty Heavy Grip Type Single Grip Speed Settings Fixed Minimum Drum or Wheel Speed 3 400 RPM Air Consumption 43 cfm Required Pressure 90 psi Air Inlet Size 3/8 in Air Inlet Type NPT Minimum Hose Size 3/8 in Spindle Thread Size Not Applicable Arbor Hole Size 5/8 in Tool Series Dynastraight