Built-in filter: This sink drain has a non-clogging filter that easily collects hair accessories, rings, dirt, and more. Effectively prevents drain clogging. It is a removable and washable sink stopper. Simply clean the dirt stuck in the filter and avoid asking a plumber for help. POP-UP FUNCTION: Our bathroom sink stoppers are made of a solid brass rebound core, which has good anti-bounce and rebound ability. The flush stopper can be closed and opened in one second! No more clogging and leaks! EASY TO CLEAN AND INSTALL: The sink drain stopper can be removed quickly and easily.