Fit and compatibility Fits drain holes with inner diameters from 34 mm to 40 mm. Compatible with most sinks, kitchen basins, bathroom washbasins, and bathtubs. Important: measure your drain hole before . Innovative push design Pushbutton mechanism to switch between storage and drainage modes. Press the lid to seal or drain; a secure hold prevents tipping when the button is activated. Multilayer sealing Upgraded multilayer sealing ring provides a tight seal and prevents leakage. Delivers performance compared with traditional sink stoppers. Debris capture system Integrated mesh filter catches hair, dirt, and small items such as jewelry. Dual filters make cleaning easier. Selfclosing feature automatically seals when not in use, keeping debris out. Use scenarios Kitchen sink: use in storage mode to hold water for soaking or prerinsing, then switch to drainage mode when ready to empty. Bathroom washbasin: fill the basin for washing or shaving in storage mode; drain when needed without spills. Bathtub: quickly fill for a bath and keep debris out with the mesh filter; drain smoothly when you are finished.