Larger Image Exclusive, one-piece metal case and bearing design eliminates any need for special assembly precautions. These precision potentiometers are completely enclosed by unique molded covers with integrally cored, solid terminals that cannot loosen or transmit solder, resin, or other foreign matter into the unit. Completely sealed covers and "O" Ring sealed shafts are available for maximum resistance to corrosive environmental conditions. Insulating materials protect against a full 1000-volt A-C breakdown. The threaded bushing design is standard. Many other mounting configurations are available, including servo mount and instrument precision ball bearings. Multiple precious metal contact brushes are another SAMARIUS exclusive. Other current carrying parts are either solid precious metal or hard gold plated.