The pop-up sink stopper is made from alloy, copper materials, safe, durable, anti-rust and able to keep it clean for long period of time. You can use this pop-up plug easily, just take out the old one and insert the plug to complete the installation. Detailed workmanship, it is corrosion resistance, offer you better service. Features -Color:Silver -Material:Alloy, copper -Size:6.50X6.20X3.20cm/2.55X2.44X1.26in -Note: Recommended for drainage holes with a diameter about 3.4 - 4 cm. - The pop-up sink stopper has a built-in anti-clogging filter, prevent the sewer from getting stuck by hair. - Easy to clean, just take out the filter, rinse it and clean, save your time and efforts. - Using copper and alloy materials, which is durable, anti-rust and able to keep it clean for a long term. - With this durable sink plug, so this sink plug can bring much convenience to your daily life. - You only need to press the cover of the sink stopper to between the sealed and drained states, effortlessly. Package list: 4 x sink stopper