Aluminum alloy; dia. Of first end is 9.50 in; dia. Of second end is 9.00 in; 15.44 in. L; first end has 8 holes, 5/16-18 unc-3b .81 in. Deep csk 90 deg. To .32 in. Dia; second end has 8 holes equally spaced, 3/8-16 unc-3b .81 in. Deep csk 90 deg. To .39 in. Dia