1. Dual Flush Toilet Kit: This toilet flush valves only fit 2-Inch two piece toilet with top push button(Not including flapper valve). Please make sure it is consistent with your original flush valve style before purchase. 2. Dual Flush Valve Water Saving Type: toilet repair kit dual flush water-saving type,can adjust water in the water tank for all drainage or quick drainage. Half and full water level adjusters to control water consumption. 3. It has good silicone washer, good elasticity, high density, sustainable use, and not easy to break 4. Quick And Easy To Install: Our toilet valve replacment suitable for most water tank two piece toilets. Easy to install and saves time and effort,get your toilet flushing like new again 5. COMPATIBILITY: Only Fit for two piece toilet tank. Please also confirm the button can be matched the new valve before purchase, if not, you need to buy a new button