Features: Applicable: This drain filter is designed for the universal bathroom sink drain. Considered the unsure of measurement the drain stopper comes with plus size of rubber rings. The ring screwed into the stopper is for 1.34-1.57 inches (30mm-40mm) drain hole; If it doesn't work after installation please try another size ring. Upgraded Edition: This core plug is suitable for 1.34-1.57 inches (30mm-40mm) dia size hole. It's more convenient to drain water compared to the rubber stopper cause it is no need to pull it out to drain and then press it to seal. Build-in Strainer: This bathroom sink drain stopper has an anti-clogging basket filter inside that can prevent the sewer from stuck with hairs rings jewelry dirt. Simple Installation: No need tool just take out the old one and insert the strainer core to complete installation. The plug avoids the problem of having to replace the entire drainpipe when it is difficult to buy the correct size drain plug. It saves you the hassle of replacing the drainpipe. Premium Material: The drain plug is made of stainless steel and brass. Quickly seal and drain water with a single press. No worry of rust cracking corrosion or leakage. Perfect match with your sink. Specification: Applicable: Suitable for 30mm~40mm drain hole Overall Size: 6 * 6 cm Bottom Diameter Size: 30mm Bottom Height: 50mm Material: Stainless Steel Notice: 1. Actual color may be slightly different from the image due to different display and light effect. 2. Please allow 1-3cm deviation due to manual measurement. includes: 1 * Deodorant floor drain ( Include Plus Size Seal Ring)