Perfect CompatibilityUpgraded Edition Bathroom Sink Stopper Apply to Standard Drain Holes Inner diameter About 34-37mm of sink drain holes. (Note: Please measure the diameter of the drain hole before purchasing ). Not matter basin, bathroom sink drains or shower bathtub drains, it can work with all. Premium MaterialOur bathroom sink stopper is made of anti-cracking thickened quality stainless steel and brass material, with durability, strong structure, it can be used for a long time without cracking and water leakage. The sink drain plug has a beautiful bullet core thrust shape and Good rebound strength, with durability, flat and comfortable touching finish and strong structure. Anti Clogging DesignThe pop-up bathroom sink stopper has dual filtering function. There is an anti-clogging basket on the surface and inside, which can prevent hair from blocking the drain. The filter cover on the sink plug can be removed directly for cleaning. Easy of UseCompared with fixed size traditional sink drain stopper, The 3 silicone rings around our built-in filter basket keeps the stability, it will not tilt when you push the button. drainage is fast and smooth, Quickly seal and drain water with a single press. which can match seamlessly with the sink drain hole under the action of water pressure. So you don't have to worry about sealing and drainage. Easy To Install & Saving MoneyNo tools required, just remove the old sink plug and insert the new pop-up bathroom sink drain stopper to complete the installation. No need for hundreds dollars on costly plumber bills, no need for troublesome tools on unclogging pipes, If you want to clean a sink stopper, you can just pull it up.