Air Random Orbital Sander 0.28 HP Pad Size 5 In. Orbit Dia 3/16 In. Vinyl Pad Face Type 1/4 in Arbor Hole Spindle Size 5/16 In.-24 Free Speed 12 000 rpm 4.5 Average CFM @ 15 Second Run Time 18 CFM @ Full Load Required Pressure 90 psi Air Inlet 1/4 in NPT Min Hose Size 1/4 In. Overall Length 7-1/4 In. Rear Exhaust Type Variable Speed No Rubber Handle Material Rubber Housing Material Lever ThrottleVacuum/Non-Vacuum Vacuum