The Fits TOTO Power Gravity 3" Flapper by Korky features an oversized sealing surface to fit large 3" TOTO flush valves. The exclusive longest lasting blue rubber resists chlorine, bacteria, city water treatment, hard water, and well water. Authorized replacement for TOTO Power Gravity flapper model THU140S. Made of flexible rubber for a tight seal and easy to install, the 2022 includes: (1) Large 3" Flapper and (1) Stainless Steel Chain.