For basin without overflow; Easy to install, with a standard installation dimension of 1 ¼, this waste plug is suitable for all commercial sinks Automatic drain and activated with the simple pressure of the finger, the cover of the sink stopper comes off by hand in just a few seconds unscrew, clean, screw and done Brass construction which is then chrome plated, anti-erosion, anti-abrasion Sealing ring: very high density and continuous Attention: The sink hole should be regular round, the edge should be smooth and flat. If the basin hole is crooked and frosted, it will leak after you install this drain