Pop-up function: The high-quality brass spring core ensures that the sink drain has good elasticity. Quickly open or close your sink drain with a simple push. DOUBLE SEAL: The black sink drain stopper is made of a double-layer silicone seal, which has good sealing performance and can effectively prevent water from flowing out from the side plunger. UNIVERSAL: The black sink drain has a standard size of 1 ¼" and fits most sinks and basins. NOTE: It only fits sinks without an overflow hole! Easy to Clean: All parts of the drain are easy to disassemble, you can turn the top cover of the bathroom drain counterclockwise to unscrew it and remove it for cleaning. Quick Installation: Installs in just a few steps, no tools required! Contains complete installation accessories.