Built-in sieve: the sink stopper with anti-blocking sieve inside, which can collect hair and prevent clogging of drain, which achieves effective filtering unlike push-button drain normal. Suitable for bathtub, bathroom and kitchen sink, and more Easy to install: No tools required, it can be easily installed with bare hands. You just need to remove the old bounce core and install a new one. Anyone can install the pop-up drain due to its simple structure.If you want to use it for larger sink hole diameter, you can use the rubber ring we provide to increase the inside diameter of the sink plug Two mode switch: The pop-up design of this sink strainer reverses the uncomfortable type of drainage. It is a bathtub stopper and a filter, 2 in 1. Just gently push the top cap down to change 2 modes, retain water and drain it Double Sealing: The sink drain trim with hair filter is made of chrome-plated brass, rustproof, sturdy and durable. Thanks to the stopper's double rubber seal, water cannot escape, making your sink 100% airtight when needed. We sell a set of 2, which is more economical. Universal: the sink stopper with spring fits all common sink drains with an inner diameter of 34 to 40 mm. Note: Please measure the size of the drain hole before purchase to prevent the product from falling into the drain hole. 6*6*6cm