Built-in Filter: This sink stopper features an anti-clogging filter that effectively collects hair and prevents drain blockages, unlike ordinary push-button drains. Perfect for bathtubs, bathrooms, kitchen sinks, and more. Easy to Install: No tools needed! Simply remove the old bouncing core and install the new one by hand. Its simple structure allows anyone to install the pop-up drain. For larger sink holes, use the provided rubber ring to increase the stopper's inner diameter. Two-Mode Switch: The pop-up design of this sink filter transforms inconvenient drainage. It's a 2-in-1 bathtub stopper and filter. Just gently press the top cap to switch between holding water and draining it. Double Seal: The sink drain cover with hair filter is crafted from chrome-plated brass, ensuring it's rust-proof, sturdy, and durable. Universal Fit: This spring-loaded sink stopper fits all standard sink drains with an inner diameter of 34-40mm. Note: Please measure your drain hole size before purchasing to ensure compatibility.