UNIVERSAL DESIGN: Flush valve repair kit suitable for most 2-Inch 2-piece with top push button toilet.MEASURE TWO SIZE: This item is only applicable to 2.36"-2.76" (6cm-7cm) Toilet tank hole Diameter,and it cannot be used if it exceed this size.Measure the Tank Height: Height Should be 12.8"-17.7"(32.5cm-45cm),Please measure the size including ceramic cover for water tank, otherwise , it won't fit.DUAL FLUSH WATER-SAVING TYPE: Dual flush water-saving type: for all drainage you can adjust water in the water tank; for half drainage, you can use the water in the water tank to adjust the silicone seal, it with good sealing effect, will not have leaking.QUICK AND EASY INSTALLATION: Our toilet drain valve is suitable for most toilets, easy to install in 10 minutes or less, and saves time and effort,get your toilet flushing like new again.