Built-in filterUnlike ordinary push-button drains, this sink drain has an anti-clogging basket filter inside, which can collect hair neatly and prevent the drain from clogging, jewelry, rings, etc. that won't get into the drain , dirt, etc. Dual Mode Switch Pop-up design subverts traditional, inconvenient sink plugs (such as basic plugs with chains)! Simply press the top cover to switch between 2 modes - stopper (holds water) and filter (drains water). 1.33-1.5 Inch Diameter Pop-Up Drain FilterThis product can be used in different types of pop-up filter basket drains. Suitable for drain holes 34mm - 38mm (1.33 - 1.5 in) ID. High-quality materialThe drain plug is mainly made of high-quality stainless steel and brass material, which is rust-proof, crack-proof and integrally formed. Good bounce and rebound strength, seals and drains quickly with one press. Easy to Install Drain FilterJust take out the old one and insert the bounce core to complete the installation. Anyone can do this. Thickened extension nut allows manual installation without the use of tools.