Made of brass (top part) and stainless steel (tube part), ensure a long service life and resist corrosion and rust. With overflow hole, this drain is applicable to the basin with overflow hole, once the water is too full in the basin, it can be discharged into the drain. Outlet valve thread: 1 1/4”; Thread diameter: 41mm; Tube diameter: 31.5mm; Tube length: 110mm. Very easy to use. You squeeze the drain to store water in the basin, and squeeze again to open it and drain the water. Essential for kitchen and bathroom, such as sink, basin, basin, bathtub, and any other sanitary plumbing.