Mark V Lab Metapol 6B3V Series Bench Top Grinder/Polisher with Dual 10" Wheels. The 6B3V features: Countdown & Elapsed Timer, Variable speed (50-1000 rpm) operation, preset fast speed buttons (100, 200, 300 rpm), auto mode (programmable speed, direction and time), tough and rugged GRP (glass reinforced plastic) construction, water inlet and outlet for wheel lubrication.The 6B3V utilizes 10" Aluminum Quick Change Wheels and comes with Splash Guard Paper Holding Band and Covers. Extra Wheels and Paper Holding Rings are sold separately. The METAPOL is available in either 110V 60 Hz. or 220V 50 Hz.