The PerforMAX fill valve and 2 in. Flapper Kit is the premium solution to make your 2 in. flush valve toilet run like new PerforMAX toilet fill valve offers high performance with adjustable tank and bowl water for full water control Fast and Easy to Install PerforMAX Water-Saving Toilet Flapper included to save water use per flush Adjustable fill valve height to fit more tanks, corrosion resistant flapper, Solid frame for a secure seal, 7 year warranty The Fluidmaster K-400H-039 PerforMAX High Performance Toilet Fill Valve and Adjustable 2 in. Flapper Kit offers the top choice to fix your toilet?s performance and saving water. This universal design, is made for 2 in. flush valve toilets including Kohler, Toto, American Standard and more. Quickly solve common toilet problems like noisy, leaky or running toilets. Featuring the high performance PerforMAX Toilet Fill Valve the quietest, most powerful fill valve on the market. Now featuring both tank and bowl water level adjustment dials, to quickly customize your water use. The EZ-Twist height adjusts from 10? to 15? to fit most tanks for a fast install. Also, featuring the PerforMAX Water-Saving 2 in. Toilet Flapper, which offers a dial adjustment to set your water use per flush. The solid frame ensures a secure seal, while the hard water resistant materials, and built-in Microban technology fight bacteria and breakdown. Upgrade your toilets fill and flush, and save with Fluidmaster?s PerforMAX Fill Valve and Flapper Repair Kit.