This toilet tank replacement kit is designed to fix common toilet issues and enhance performance. Made of high-quality ABS material, it ensures reliable functionality under various water pressures and qualities. It addresses leaks caused by worn flappers, handles, or faulty chains, and includes a 38mm flush button that fits most US toilets, eliminating the need for a full toilet replacement. The package includes an inlet valve, a 3 in. dual flush drain valve with an 11 in. overflow pipe and 7.87 in. main body, drain valve accessories (2 M10*3.74 in. plastic bolts and a 3 in. foam pad), and a 1.88 in. flush button. With a fine water level adjustment screw, you can easily control the water level for low flow usage, and its height adjusts from 8 to 13 in. to match different tank sizes. The drain valve operates silently during filling, and the dual flush modes (full and half) save water while delivering powerful flushing. Installation is tool-free, following included instructions for quick setup, making it a practical solution for maintaining a functional, efficient toilet. Material: Acrylonitrile Butadiene Styrene (ABS).