SRB Booster Separation Motor (BSM) heat shield cover. This ‘toilet seat cover’ heat shield measures approximately 20″ long when opened, with cover having a diameter of eight inches, and is stamped on the reverse, “S/N 4033.” This cover was one of four installed and flown on one of the shuttle missions. Cover has been decommissioned on one side with red paint. In fine condition, with expected wear. RR Auction COA.