STD WINDSHIELD WIPERS are standard marine wiper units equipped with heavy duty motor and gear train. Self-parking. Case construction is corrosion-proof, aluminum alloy for light weight installation. Base plate and mounting plate are naval brass with heavy chrome plating. Not waterproof. 11" straight arm and blade. Max. draw is 5 amps. Frame mount. Sweep - 110°. Shaft is 3/8" x 2-1/2".