Durable ABS Construction: Crafted from premium ABS material, this toilet tank top push switch ensures long-lasting durability and exceptional wear resistance for extended use. Dual Flushing Options: Experience enhanced flushing control with the dual-flush operation feature, enabling you to choose between different water volumes for efficient water conservation without compromising performance. Compatible with 49 Valves: Specifically designed for 49 valves, this toilet button guarantees a precise fit without compatibility concerns, ensuring seamless integration into your existing toilet system. Easy Installation Upgrade: Simplify the process of upgrading your toilet system by effortlessly replacing old buttons with this model. With a straightforward screw-in installation method, transforming your toilet has never been easier. Size Compatibility Check: Prioritize compatibility by verifying that your tank hole size falls within the optimal range of 38mm to 42mm, ensuring a perfect fit and hassle-free installation experience. Item Name: Toilet Tank Switch Material: ABS How to Use: Press Hand Compatible: for Twyford/Siamp 49 Valves Features: Dual Flushing Option, Easy Installation, Size Compatibility Size Details: Top Diameter: 4.8cm/1.89" (Approx.) Screw Diameter: 0.77cm/0.3" (Approx.) Total Height: 8.7cm/3.43" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Toilet Tank Switch