Universal Toilet Flapper Toilet Repairs Flapper: The 2 inch flapper compatible with American Standard, Kohler,Toto, Gerber and so on. This toilet flapper easily fix your running toilet problems High efficiency-This rubber toilet stopper flapper replaces old or leaky toilet flappers to save your water and money. Fits for city water treatment, hard water, and well water Easy to install: Including Stainless steel hook and chain attachment. No tools need for installation Reliable Material: This type of toilet flapper is made of high performance rubber for a tight seal, no seepage and leaks from the toilet tank Note: make sure you measure the opening in your toilet tank is 2". Measure the correct size to avoid leaky problem Universal Toilet Flapper Toilet Repairs Flapper: The 2 inch flapper compatible with American Standard, Kohler,Toto, Gerber and so on. This toilet flapper easily fix your running toilet problems.