[ Universal Size ] The inner diameter of sink plug strainer is 33.5mm. Suitable for drain holes with an inner diameter of 34mm - 38mm(1.34 - 1.49 in). [ Premium Material ] The sink drain plug is mainly made of thickened brass copper materials, sturdy, anti-rust, anti-cracking. With its good bounce and rebound strength, rapidly draining and quickly sealing water. [ Easy to Install ] No tools are needed, it can be installed easily with bare hands. You just take out the old bounce core and install a new bounce core. Anyone can install the pop-up drain because of its simple structure. If you want to use it for a larger sink hole diameter, you can use the rubber ring we included to increase the inner diameter of the sink plug. [ Build-in Strainer ] The sink plug with an anti-blocking basket strainer inside which can collect hairs and prevent the drain from clogging up, achieving effective filtering, unlike regular push button drain. [ Two Mode Switch ] The pop-up design of this drain stopper overturns inconvenient way of drainage. It is 2 in 1 bathtub plug and filter. Just press the top cap down gently to switch 2 modes include holding water and draining off water.