Universal Size: This basin is a universal stainless steel product with spring core, can be used for different types of basin drains. The inner diameter of the sink strainer is 37mm. Suitable for drain holes with an inner diameter of 38-43mm. Easy to install: No tools required, it can be easily installed with bare hands. Just remove the old bounce core and install a new bounce core. Anyone can install the pop-up drain due to its simple structure. If you want to use it for larger diameter, you can use the rubber ring we provide to increase the inside diameter of the sink plug. Premium material: the drain plugs are mainly made of premium stainless steel and thickened copper - Durable, anti-rust, anti-crack. With good bounce and bounce resistance, water drains quickly and closes quickly. Built-in strainer: The sink stopper has an anti-blocking basket inside, which can collect hair and prevent channeling, which provides efficient filtration unlike push button plugs. Suitable for bathtub, bathroom and kitchen sink, etc. Two-mode switch: The pop-up design of this drain strainer switches the uncomfortable way of drainage. It is 2 in 1 tub plug and filter Just gently press the top cap down to switch the 2 modes including water holding and water draining.