The item consists of one cover made from aluminum alloy SH 5052-0, meeting QQ-A-250/8 specifications, with a thickness of 0.050 inches; one flange (P/N 126756); one liner made from aluminum alloy SH 5052-0, meeting QQ-A-250/8 specifications, with a thickness of 0.030 inches; one plate assembly (P/N 126113); and associated hardware.