Kohler Toilet Flapper 1078441 – Buoy Upgrade, Fits Rectangle Overflow Tube, 3.75-Inch Wingspan Upgrade your Kohler toilet’s performance with the Kohler 1078441 Flapper featuring a buoy float for improved flush control. Designed with extra-wide wings for a secure fit, this flapper ensures the valve stays open longer, delivering a fuller and more powerful flush. The adjustable buoy allows you to fine-tune flush duration to meet your household’s needs. Compatible with popular Kohler models including Bancroft, Cimarron, Devonshire, and Memoirs, this replacement part offers reliable performance and easy installation. Replaces Kohler flappers #1016546 and #1042313.