GENERAL CHARACTERISTICS ITEM DESCRIPTION | LENGTH: 17.000 INCHES; MOUNTING HOLE DIAMETER: 4.015 INCHES; COVER LENGTH 5.000 INCHES; WIDTH 4.500 INCHES; MATERIALS AND FINISH ALUMINUM ALLOYS, ALODINED PER MIL-C-5541, COLD ROLLED STEEL, ZINC PLATED, BUNA-N O-RING AND SEAL |