79MM SINK HOLEThe outer diameter of the sink plug is 79mm.. Fits most overflow pools with closed plugs or eccentric pools. A NOTICE: Please check the sink drain pipe size/diameter carefully before purchasing. QUALITY & PRACTICAL Our kitchen drain plug is made of high quality 304 stainless steel, copper and rubber using high quality electroplating technology, which is rust and corrosion resistant , thickened and durable. The package includes 2 pcs flushing filters and 2 pcs drain hair catchers. Convenient and allows you to use it in the bathroom. UPGRADE 20 HOLESUnlike other strainer plugs with 18 holes, our plugs are upgraded with 20 small holes. This allows it to quickly drain water while catching fine waste. DUAL FUNCTION The stainless steel strainer plug can be used as a flush plug and filter at the same time: Push the strainer down to plug the hole, lift slightly to drain the water and catch any debris. It is the ideal choice for your family. WIDELY USEThese drain strainers fit old sink, basin, bathtub and traditional drain pipe fittings.