Mark V Lab Metapol 2BVV & Metapol AV Series Bench Top Metallurgical GrinderPolisher with Single Wheel, The Metapols features Timer, Variable speed (100-1000 rpm) operation, preset fast speed buttons (100, 200, 300 rpm), auto mode (programmable speed, direction and time), tough and rugged GRP (glass reinforced plastic)non-corrosive body construction, water inlet and outlet for wheel lubrication. Metapol 2BVV Includes 8" or 10" Quick Change Wheel, Splash Guard and Cover. Metapol AV Includes 12" or 14" Quick Change Wheel, Splash Guard and Cover. Extra wheels and paper backed paper ring are quoted separately. Optional Automatic Polishing Head can be ordered with the system or for later installation. The Metapol Polishers have a built-in transformer so they can be operated at either 110V or 220V (factory preset). Metallography made easy.