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, and THU445.10F. It is not intended for use with one-piece toilets, ensuring a proper fit with the specified models. Durable and Adjustable Design: Made from sturdy ABS plastic with a chemical-resistant silicone seal to prevent warping. The overflow tube is adjustable and can be trimmed to meet specific requirements, offering a customizable fit for your toilet. Effective Leak Prevention: This replacement kit addresses common issues related to leaking toilets. Replacing worn valves and gaskets helps prevent water waste and provides a reliable, long-term fix for toilet tank leaks. Simple Installation Process: Designed for quick and easy setup, this flush valve kit can typically be installed in under 20 minutes. The user-friendly design allows for tool-free installation without the need for professional assistance. Compatibility and Installation Instructions: Before purchasing, please confirm the size and compatibility with your toilet as shown in the product images. This kit is designed to fit TOTO tank flush valves and is compatible with older THU 440 models and most 3-inch two-piece toilet tanks. Color: As shown in picture Material: ABS Package Contents: 1 x Toilet tank flush valve assembly Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.