Includes extra double-head ring for tighter fit and spare; easy, tool-free install. Improved seal: full-depth threads to the top; 1.5 in version is +0.05 in (+1.27 mm) longer than OEM. Two lengths: 1 in (25.4 mm) and 1.5 in (38.1 mm); weight 30 g (1.06 oz).
