High-quality plastic material: These round sink overflow rings are made of ABS plastic. The cover is printed with chrome. They look modern and shiny. They decorate the overflow hole but do not block it. They can be used for a long time in the kitchen or bathroom. Design: The surface of the round overflow ring is chrome-plated and the color is uniform, ensuring the gloss and brightness of the surface. They have excellent corrosion resistance to offer you a long service life. Packaging: 12 pieces of sink overflow rings. Suitable for most sinks. Easy to replace; Size: The outer diameter is approx. 30 mm/1.18 inches and the inner diameter is approx. 20 mm/0.79 inches. The height is approx. 15 mm/0.59 inches. Suitable for standard overflow holes of 22 - 24 mm. Easy to install: You only need to apply a little soap to the sink overflow ring and then you can simply push it into the sink hole without damaging the cap's feet. It's easy to use. Wide application: Our sink drain caps are suitable for most types of sinks on the market. They can be used in homes, hotels, shopping malls, factories, and other locations. Please check whether your overflow hole diameter is compatible with our products before purchasing.