Flown SRB Heat Shield Cover. This ‘toilet seat cover’ heat shield measures approximately 20″ long when opened, with cover having a diameter of 7.5 inches. This cover was one of four installed and flown on one of the shuttle missions. In fine condition, with expected wear, red paint remnants and only partially legible numbering. Accompanied by two NASA photos of the shield on one of the boosters. RRAuction COA.