Toilet Flush Valve Replacement: Designed for 3-inch two-piece toilet tanks, this flush valve is compatible with Toto models THU 440-1, THU 460.6d, THU 338-N, THU445.10F. It is not designed for use with one-piece toilets, ensuring an exact fit with the intended model. Durable and Adjustable Design: This flush valve is made of sturdy ABS with a chemical-resistant silicone seal to prevent warping. The adjustable overflow tube can be cut to fit specific needs, providing a customizable solution for your toilet maintenance. Effective Leak Prevention: This replacement kit solves the most common problems associated with leaking toilets. By replacing worn valves and gaskets, it not only prevents water waste but also provides a long-term solution for leaking toilet tanks. Simple Installation Process: The flush valve kit is designed for quick and easy installation, typically taking less than 20 minutes to set up. This user-friendly design ensures that you can install it efficiently without professional help. Compatibility and Installation Instructions: Before purchasing, please verify size and compatibility with your current toilet setup as shown in the main image. This kit is designed to fit TOTO tank flush valves and is compatible with the older part for THU 440 and most 2-inch two-piece toilets. Color: As Shown Material: ABS Package Contents: 1 x Toilet Tank Accessory Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.