Durable elastic spring: The flush button uses a 304 stainless steel spring. It has passed a 100,000 continuous press life test, delivering elasticity, no leakage, and no jam. A reliable replacement for a damaged button. Material and design: The black doublepress toilet button is made of quality ABS plastic with a frosted surface. It is stylish, detachable, and easy to install. Compatibility and aesthetics: Push button flush is compatible with most doubleflush toilets or water tanks. The black button pairs with a white toilet tank cover, adding elegance and simplicity to your bathroom. Installation size and adjustability: The button has a 38 mm diameter opening. The screw is 12 cm long and can be cut to fit the height of your water tank. Use scenarios: Replacing a broken or unreliable flush button on a dualflush toilet to restore proper function. Upgrading an older toilet with a durable, easytoinstall button that looks good with a white tank cover. Retrofit or installation on most doubleflush systems with standard 38 mm openings, with adjustable screw length to fit different tank heights. Performance and reliability: The 100,000cycle life test demonstrates durable operation, with no leakage and no jamming, making it a dependable replacement option.