Dual flush operation: Designed for close-coupled cisterns, this toilet push button offers efficient water management with its dual flush functionality, allowing you to choose between a full or partial flush as needed Compatible with for Optima 49 valve: Specifically engineered to fit Siamp for Optima 49 valves, this button ensures a perfect replacement for your existing flush mechanism, providing seamless integration with your toilet system Easy installation: With a 48mm diameter suitable for standard cistern holes, this push button simply screws into the flush valve, making replacement a straightforward task for most DIY enthusiasts Construction: Crafted from high-quality ABS material, this silver-colored button is built to withstand frequent use, long-lasting performance in your bathroom Versatile fit: While designed for specific models, this button is compatible with select Twyford and Vitra toilets, offering a stylish and functional upgrade to your existing bathroom fixtures, Manufacturer: Blyxon