The original blue flapper with float. It fits the following Kohler tank numbers 4401, 4445, 4447, 4454, 4464, 4605, 4607, 4608, 4619, 4620, and 4621. Also was used in some Briggs toilets. Replaces Kohler 1006958 hard plastic Kohler flapper. This Kohler flapper comes complete with the chain, float, and hook.