Easy to install: our sink overflow rings are easy and convenient to match with faucets, you just need to push and click to place them, put some soap on them can help slide easily without breaking your feet of the cap cover, easy for you to install. Size detail: the outer diameter of the round ink hole overflow cover is approx. 30 mm/ 1.18 inches, and the inner diameter measures approx. 20 mm/ 0.79 inch, about 16 mm/ 0.63 inch in height, well fit standard 22 23 mm overflow holes. Keep the surface bright and shiny: our Basin Trim Overflow Drain Plug Covers are designed with good adhesion, classic color and nice corrosion resistance, which will ensure a brighter and shinier surface. Plastic material : these round bathroom sink hole overflow covers are made of ABS plastic material, the cover is printed with chrome, looks modern and shiny, suitable for decorating the overflow hole, does not block it not, can be used for a long time in the kitchen or bathroom