Popup Waste Coupling 【POP-UP BUTTON DESIGN】: The pop-up sink drain stopper is different from the lifting rod. You only need to push down to seal or open the sink drain, which is easy to operate. It is suitable for bathroom basin sink with overflow. 【EASY TO INSTALL & OPERATE】: The installation process is simple and swift, won’t be much time-consuming. To operate, press the top to close, again press the top to open which helps as antifoul and anti cockroach trap. 【AVAILABLE IN TWO DIFFERENT SIZES】: Two different sizes are available for washbasins i.e. 4 and 7 inches, which can be selected according to the basin type. Choose the ideal coupling accordingly. Popup Waste Coupling