BUILT-IN FILTER- This pop up sink stopper is equipped with an anti-clogging basket strainer, compared to normal sink drains, this sink stopper can prevent gem rings, dirt and other objects from entering the drain pipe to prevent clogging of the drain pipe. POP UP VALVE - The sink stopper has a pop-up design, it will not be not tip over when pressing the button, can prevent the sewer sticking and avoid the peculiar smell from developing. With the high quality brass compression spring, the pop up sink plug can be closed and opened in a second QUICK INSTALLATION - All you have to do is pull the plug out of original drain by hand, insert our sink stopper to easily complete the sealing and filtering. Installation and disassembly can be done in 3 seconds without tools. WIDELY APPLICABLE - This pop up sink stopper is suitable for drain holes with a diameter of 26-50mm (1.02 to 1.96 inch), the universal drain plug can use for 99% sink and vanity, whether in bedroom, kitchen, bathroom.