The flush ball can be used in various older toilets along with newer toilets. To maintain the same great Kohler quality youve grown to expect with all of Kohlers product, rely on Kohler genuine partsWorks on various one piece toilets,For use with Kohler Palarre 3383, Rochelle 3385, Champlain 3390, Pompton 3400 toilets,Corrosion resistant flush ball