Dear customer, Thank you for choosing our products. If there is any problem with our products, please contact us through the order information. We will be happy to serve you and solve it for you as soon as possible within 12 hours, thank you! Major Function - This bathtub drain stopper seals drain and save water. Safe and Environmentally - The Bathtub Stopper is made of food-grade silicone, soft, non-toxic,environmentally and skin-friendly. It is easy to clean and can be sterilized in boiling water. Universal Size - The Water stopper bathtub maximum diameter 5.12in, inner diameter 2.16in, that compatible with different types of tub drains, bathroom sink, kitchen sinks or floor drains. Built-in Suction Cup - A small suction cup helps it to adsorb and prevent moving, it can sucks on the wall when not in use occupied no space. Durable Sanitary Sink Plug Cover: stain-proof, recyclable, easy care, machine washable, keep water and toys in tub from flowing down as well as prevent undue blockage at some extent.