The primary function of these sink hole cover is to prevent water from overflowing in your sink, which can help avoid potential damage and maintain a clean and safe bathroom environment. They are suitable for most sinks, bathtubs, basins, and other sinks, widely used in homes, offices, kitchens, bathrooms, dormitories, hotels, shopping malls, factories, and other places.SpecificationColor: Gold/WhiteMaterial: BrassRound Hole Cover:Inner Diameter: 13 mm / 0.51 InchOutside Diameter: 29.5 mm / 1.16 InchHeight: 10 mm / 0.39 InchAdaptation Hole Diameter: 22-24 mm / 0.87-0.94 InchOval Hole Cover:Size: 54 x 19 mm / 2.13 x 0.75 Inch(L*W);Inside Size: 48 x 12 mm / 1.89 x 0.