【Quick-Open and Close Valve】: This sink stopper features a quick-open design that combines the stopper and the filter. Simply press the top cover lightly to switch between storage and drainage mode. It has a built-in silicone sealing ring to prevent leakage when storing water. The evenly distributed drain holes allow water to drain quickly and smoothly when draining. 【Easy to Use】: This drain stopper has an inner diameter of 30 mm and a height of 80 mm, suitable for most drain holes with a diameter of 33-40 mm. It is easily installed without tools: simply insert the filter into the drain hole and it will be fixed. Gently twist the strainer basket to remove it, unlock the lock, and easily pull it out for cleaning. 【High-quality materials】: This sink strainer is made of high-quality stainless steel and thick copper to ensure its strength and durability. With a brass inner core and thickened spring, it is more flexible when squeezing, not easy to break or rot.