Material - Made of high quality ABS plastic, better grip than metal, won't scratch your basin; good adhesion of plating, uniform color and corrosion resistance; resistant, ensure the surface gloss and shine. Size - Overflow drain cover size: 1.29 inch diameter. Suitable for 0.87inch-0.94inch/22mm-24mm hole, almost fit for all types of ceramic sinks on the market. Easy Install, No Tools Required - Put a little soap on top of them when installing so they slide in easily and don't break. Just push in and click into place, please don't be afraid to push it. Widely Application - Widely used in homes, shopping malls, hotels, factories, schools, including kitchens and Bathrooms. Package Include: 4overflow cover. Provides a decorative solution to cover the overflow opening, enhancing the overall design of the bathroom and complementing the void.