1.Perfect Compatibility: Our universal bathroom sink stopper is suitable for 99% US standard sink drain holes (1.1inch-1.5inch inner diameter). It comes with two sizes of silicone rings, ensuring a proper fit with all kinds of drain holes. Other similar products are too large for American sinks. [Notice] Please measure the sink drain hole before purchase. 2.2 IN 1 Sink Stopper & Strainer: It combines water-seal with filter in 1 tool. Compared with the ordinary button drain plugs, the upgraded pop-up sink drain stopper has an inbuilt anti-clogging basket, which can prevent the drain from clogging up by hairs and keep jewelry from falling in, such as bracelet, ring, etc. 3.Premium & Material: The drain stopper is made of anti-cracking thickened quality stainless steel and brass material. It can be used for a long time without cracking and rust. The high-quality silicone ring has a good air tightness, which can effectively prevent water from leaking. 4.Drained Quickly with One Click: The bathroom pop-up sink stopper has a built-in spring, which can switch ly from pop-up (to drain off the water) to closed states (to keep the water). Operating with one click, it can seal and drain water quickly.