Fine filter holes: This drain plug is an anti-clogging filter, the filter is more dense and effective against blockage, than the drain clogs. Thus, no objects such as rings, jewelry, dirt, etc. enters the drain. Two seals: Optimized and improved drain plug, increased on 2 seals, it is suitable for drain holes with an inner diameter of 34-40 mm, to avoid common problems such as inconsistent size and insufficient adaptations. Suitable for most sinks. Rust and Corrosion Protection: The drain plug core is made of brass, the spring is thick and the service life is long. The basket is galvanized with ABS plastic to effectively prevent rust and corrosion caused by sewage and oil stains. Easy to use: No need to replace drain parts, it just remove the original copper core, insert our drain plug, gently shake the drain screw to fit into the drain hole, press the switch to close the reservoir and water flow. Cleaning and odor removal: Thanks to the removable basket design, take out the plug and remove the basket, you can easily remove foreign objects - It can also prevent the channels from exhaust venting and avoid special smell. Note: The data is all manual measurement, please allow 1-3cm error; due to the difference in light and display, there are would have some color difference, please refer to the actual item received.