General description Made of brass (top part) and stainless steel (tube part), this Pop Up Push Open Drain with Overflow for Sink Basin ensures a long service life while resisting corrosion and rust. It features an overflow hole, making it suitable for basins equipped with an overflow system. When the water level in the basin becomes too high, it can be discharged into the drain. Technical specifications Outlet valve thread: 1 1/4” Thread diameter: 41mm Tube diameter: 31.5mm Tube length: 110mm Usage You squeeze the drain to store water in the basin and squeeze again to open it and drain the water. This product is essential for kitchen and bathroom applications, including sinks, basins, bathtubs, and other sanitary plumbing.