With Flex, you get a functional drain plug and a drain strainer that guarantees to protect your drain from clogging with hair. Simply place the drain plug over the drain of your bathtub, shower tray, sink, or basin. To use it as a drain stopper, just press down the center of the plug. To use it as a hair strainer, open the valve by pressing the silver button in the center. Flex has a diameter of 8.9 cm, a height of 3.2 cm, and fits all standard drains.