Rubberized cork fuel cap gasket for massey harris: challenger, colt 21, mustang 23, 1001, 101 jr, 101 sr, 102 jr, 102 sr, 20, 201, 202, 203, 22, 30, 33, 333, 406, 44, 44-6, 444, 44 special, 55, 81, 82.