STURDY-DURABLE: Our Toilet Stopper Flapper Is Made of Premium Rubber, Corrosion-Resistant Resists Chlorine, Apply to City Water, Hard & Well Water. Our Toilet Plug Has a Stainless Steel Chain, Which Can Be Easily Adjusted to a Suitable Height.COMPATIBILITY: Suitable For Most 3-Inch Toilet Stopper Flapper, Including TOTO Models CST743S, CST44S, CST44SD, CST44SDB, CST44SLD, CST44SLDB, CST54SF, CST64S, CST774S, CST784SF, CST79SF, CST804S, MS756204SF, MS853113S, MS854114S, MS874114S, etc. This Is a Very Efficient Toilet Repair Part.SAVE WATER: These Toilet Drain Plugs Adopt an Integrated Design with High Manufacturing Precision. Will Not Be Deformed, Long-Life, And Has Good Sealing. The Rubber Can Form a Tight Seal to Achieve Maximum Flushing Efficiency And Save Water.EASY TO USE: Easy to Install With Two Simple Adjustments, First, Replace Your Leaky And Inefficient Toilet Flapper; Second, Replace The New Toilet Flappers And Adjust The Chain to a Suitable Height to Complete.