With valve, anti-odor: Triple anti-odor: sealed upper cover to prevent odor from overflowing, filter basket to intercept hair foreign objects, automatic closing anti-odor core to prevent clogging, closed without gaps. The pop-up sink plug can be used for different types of pop-up basket drainers, and the hole size 34- 40MM can be used.Preferred material: The drain plug is mainly made of high-quality copper material, which is anti-rust, anti-crack, and integrally formed. Good resilience, fast drainage and fast water storage. The thickened copper material is strong and durable, and the thickened refined copper is not easy to rust.Built-in filter basket: The sink plug has a large filter basket inside, which can collect hair and prevent the drain from clogging for effective filtration, and it is also equipped with a rubber ring to prevent water leakage, which is different from ordinary push-button drains. The detachable design of the sink plug is very user-friendly and easy to clean, suitable for bathtubs, bathrooms and kitchen sinks, etc.Easy to install: No tools required, easy to install with bare hands. You just take out the old bounce core and install the new one, plug and play. Anyone can install the pop-up sink plug due to its simple construction. Two Modes : The pop-up design of this sink stopper subverts the inconvenient way of draining water. It's a 2 in 1 tub plug and filter. Simply press the top cover lightly to switch between 2 modes, including water storage and drainage.