For pool without overflow; Easy to install, with a standard installation dimension of 1 ¼ inches, this drain plug fits all standard sinks Automatic drain and finger-press operation, the sink drain plug cover can be removed by hand in a few seconds. Unscrew, clean, screw and you're done Brass construction that is then chrome-plated, corrosion and abrasion resistant Sink ring sealing: very high density and continuous < p>Attention: The drain hole must be regularly round, the edge must be smooth and flat. If the drain hole is crooked and icy, it will leak after installing this drain.