METAPOL A 12" Wheel Automatic Metallurgical Automatic Grinder/Polisher offers a variable speed (0-1000 rpm) wheel which can rotate in both directions, pneumatically adjustable individual piston polishing head for polishing 1 to 6 specimens independent of each other, eliminating the need for dummy samples. Easy to use controls and quick-locking swing mounted design feature multiple Programs for Pressure, Time, Speed and Water. The METAPOL A feature rugged GRP (glass reinforced plastic) non-corrosive body, water inlet and outlet. Specimen Holders are available for 1", 1.25" & 1.5" Samples. 110V