Compatible design: This toilet dual flush button is engineered to work flawlessly with forSIAMPOPTIM49 valves, delivering a fit without compatibility issues. Water conservation: Dual flush mechanism lets you select the appropriate flush volume, promoting water savings while maintaining strong flushing performance. Durable construction: Made from ABS material, this flush button withstands daily use in humid bathroom environments, delivering longevity and reliable operation. Use scenario: Replacing a worn or faulty flush button in a family bathroom to restore reliable operation and enable watersaving flush options. Use scenario: Upgrading a rental or guest bathroom to a dualflush system for improved efficiency and reduced water bills. Use scenario: Installing in traffic or humid bathrooms where the durable ABS construction ensures longterm performance and resistance to moisture.