Dynabrade 59043 6" (152mm) Dia. Self-Generated Vacuum Dynorbital-Spirit Random Orbital Sander.25 hp, 12000 rpm, 3/32" (2mm) Dia. Orbit, Rear Exhaust Includes low profile, premium urethane weight-mated sanding pad. Black lever identifies 3/32" (2.5 mm) dia. orbit, used for ultra-fine sanding Drop-In Motor available (sold separately) to reduce costly down-time associated with routine maintenance. More Power - True 12,000 RPM air motor Comfort Platform provides additional hand and wrist support, further enhancing operator comfort. Also offers increased protection against cold air exhaust 6" (152mm) Dia. Self-Generated Vacuum Dynorbital-Spirit Random Orbital Sander, .25 hp, 12,000 rpm, 3/32" (2mm) Dia. Orbit, Rear Exhaust