Unique Design: No matter how large the water volume is, it can be discharged quickly, draining quickly, without water accumulation. Selfcleaning by rotating, keep clean at all times. Safe Material: TPR soft rubber, not easy to damage, can be reused for many years.Size: about 5.3*5.3cm/2.09*2.09in Easy to Use: Open the package and use it, just insert the product directly into the end of the sewer. When the filter element needs to be cleaned, it can be directly pulled out of the sewer through the handle. Closed Insulation Technology: Since the sewer is connected to the underground septic tank, sewage or other air can enter the room through the odor drain pipe. Every family needs a highquality floor drain core to prevent foreign materials from flowing out. Applicable Site: This type of floor drain can be used for about 3537mm/1.381.46in, and is suitable for 99% of the sewer diameter. For example, kitchen sinks, bathroom sinks, toilet floor drains, these places can all be used. It can easily solve the problem of sewer bugs and remove peculiar smell.