Steel per aisi mt1010-mt1020, 2.000 in. Id, 0.438 in. Wall thk, 12.125 in. O/a lg, both ends identical, recessed, 1.2495 in. Min, 1.2505 in. Max recessed dia, 1.375 in. Recess lg, inside corners chamfered 0.125 in. By 10.0 deg, outside corners chamfered 0.312 in. By 45.0 deg, enameled finish