For FX and Sportster 1973-1976 (35mm Kayaba forks). The U.S.A. made American classic fork seals patented pressure balance design performs unlike any stock imported fork seal. Made of state of the art material, the seal is allwed to float in the seal cavity, adjusting to verying pressure spikes under all conditions, thus resulting in longer seal life and substantially less seal drag (stiction). Sold as pair.