Washbasin drain for basin without overflow; Easy to install, with a standard installation dimension of 1 ¼, this sink drain is suitable for all commercial sinks. sink comes off by hand in just seconds unscrew, clean, screw and done Brass construction which is then chrome plated, anti-erosion, anti-abrasion Ring of sealing: very high density and continuous Attention: the sink hole must be regular round, the edge must be smooth and flat. If the sink hole is crooked and frosted, it will leak after you install this sink drain Note: The data is all manual measurement, please allow 1-3cm error, due to the light and display difference, there will be a certain color difference, depending on the physical object received Delivery Quantity: (according to the main image)