Double Filtration: The removable stainless steel strainer at the top of the sink drain easily traps hair and other impurities, it is easy to clean and prevents valuables from falling into the pipe. The filter spring core at the bottom traps small particles, thus avoiding pipe blockages Valve Design: The valve at the bottom of the sink drain uses a magnetic principle, closing automatically when there is no water flow Universal Drain Plug: Suitable for bathroom and kitchen. The bathroom sink drain plug can be used for different types of sink and bathtub drain pipes, suitable for drain holes with an inner diameter of 32 mm to 42 mm Materials: The sink drain plug is made of stainless steel and brass, durable, rust-proof and crack-resistant. The surface is plated with multiple layers, which prevents rust. A high-quality silicone ring effectively prevents water leakage. The built-in spring device is elastic, pressure-sensitive, and does not block. Easy to Install: The structure of the sink drain plug is simple and requires no tools. Simply remove the old plug and insert the new one. Just lightly press the spring core of the cap to switch between holding and draining water.