Copper nickel alloy; o/a lg 16.312 in.; od first end 6.500 in.; first end bolt hole circle 5.250 in.; first end bolt holes-six equally spaced 0.688 in. Dia; od 2nd end 5.250 in.; 2nd end bolt hole cirle 4.500 in.; 2nd end bolt holes-six equally spaced 0.400 in. Dia