Elastic spring for reliable operation: internal 304 stainless steel spring with a 100,000 press cycle life test, providing elasticity, no leakage, and no jamming. A durable replacement for a damaged button. Material and design: black doublepress flush button made of quality ABS plastic with a frosted surface. Stylish and detachable, easy to install. Compatibility and aesthetics: suitable for most dualflush toilets or water tanks. The black button pairs well with a white toilet tank cover, adding elegance and simplicity to the bathroom. Installation size and fit: 38 mm installation diameter. Screw length is 12 cm and can be cut to suit the height of the water tank. Use scenarios: a faulty or jammed flush button in a residential bathroom for immediate, reliable operation. Upgrade a bathroom renovation with a stylish black button that coordinates with white tank covers. Restore quick, dependable flushing in hotels, offices, or other commercial restrooms that use dualflush systems.