MaterialThe sink overflow ring is made of high-quality ABS plastic, which has good toughness, is strong and durable. Compared to metal overflow stoppers, our sink stoppers will not scratch your sink. WHAT YOU GET 5 double-layer overflow covers. The outer diameter is 33mm and the inner diameter is 27.5mm, designed to fit standard overflow holes from 22mm to 24mm (7/8"). Design The surface of the round cover is chrome-plated with uniform color, ensuring the gloss and brightness of the surface, and has excellent corrosion resistance, giving you a long service life. Easy to InstallOur sink overflow ring is simple and convenient to use with the faucet, you just need to push and click to place it, applying a little soap on it can help it slide easily without damaging the feet of the cover, making it easy to install. Multiple applications Our sink cover can be matched with most types of sinks, perfect for schools, homes, hotels , shopping malls, factories and other places.