Bathroom Smell Proof Floor Drains Siphon Drain Cover Sink Strainer Plug Trap Water Drain Filter Home Kitchen Sink Accessories Description: Functions: (1) Insect prevention (2) Anti odor, deodorant (3) Anti defection Features: (1) Easy to install, plug and play. (2) Fast drainage. (3) Adjustable Size. (4) Automatic opening when draining, closing after draining. Working Principle (1)When the water into the ground drain, the gravity of the water will open the lowest of the ABS gasket, dripping unimpeded. (2) After disruption of water, ASB gasket is robotically closed because of gravity sealed simply so the fuel within the pipeline, pests and over stream cannot be up. Materical : ABS Metal Applications : for 3~4 cm holes Specifications: Easy to install, plug and play. Fast drainage. Adjustable Size. Automatic opening when draining, best after draining. Package Included: 1* floor drain core 1* fixed discount ring Notes: 1. Measurement of the item lying on the table can cause slight difference. 2. The genuine colour of the thing could also be barely assorted from the images proven on website brought on by many points reminiscent of brightness of your display screen and light brightness when photograph taking. Thank you on your understanding!