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 filter is 37mm.Suitable for drainage holes with an inner diameter of 38-43mm. Easy to install: No tools are required, it can be easily installed with bare hands.Simply remove the old rebound core and install a new rebound core.Anyone can install the pop-up drain because of its simple structure.If you want to use it for a larger diameter, you can use the rubber ring we provide to increase the inner diameter of the sink stopper. Premium material: the drain plugs are mainly made of premium stainless steel and thickened copper - Durable, anti-rust, anti-crack.With its good bounce and bounce resistance, water flows quickly and closes quickly. Built-in strainer: The sink stopper has an anti-blocking basket inside, which can collect hair and prevent draining, allowing for effective filtration unlike push-button drains.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 bathtub socket and filter.Just gently press the top cap down to change the 2 modes including holding water and draining water.