The PLANAPOL PDM 12" Wheel Automatic Metallurgical Automatic Grinder/Polisher offers a variable speed (0-500 rpm) 12: wheel, gravity feed adjustable individual piston polishing head for polishing 1 to 6 specimens independent of each other, eliminating the need for dummy samples. Easy to use quick-locking swing mounted design and simple controls for Time, Speed and Water. The PLANOPOL PDM feature rugged steel design non-corrosive bowl, water inlet and outlet. Specimen Holder for 1.25" Samples. Factory Rebuilt with new Bodine Motor & Control. Full 1 Year Warranty. 110V