Material is 2014-t6511 aluminum alloy per qq-a-200/2, min tensile strength is 65, 000 psi, min yield is 55, 000 psi, min elongation is 7 percent, tube is295.80 in. Long, inside diameter is 8.290 in. Min and 8.300 in. Max, outside diameter is8.480 in. Min and 8.485 in. Max