Leakproof Seals Showa Fork Seal Kit For Harley Features: 41mm (41 mm ID x 54 mm OD x 10 mm T) Leak Proof Seals are made in the USA from the highest quality materials Includes a Manufacturer's Lifetime Guarantee Pro-Moly Fork Seals are made of a special rubber/moly blend that results in a permanent 20 reduction in friction for smoother action and less wear on sealing surfaces Replaces OEM 45843-77