Features: Water Seal Structure: Blocking odor overflow, sealing water-proof; vortex back to the water area, intercepting foreign objects, etc. Removable filter basket blocking hair foreign matter put blockage, anti-blocking and anti-drop small items. Design: Ungraded one-way magnetic valve, automatically open and shut-off, prevent the backflow while allow the water to easily drain. Good Choice: Prevent sewage odor and cockroach issues with efficiency. An indispensable kitchen / bathroom accessory. Suitable for: Just install in every sewer, such as kitchen sink, basement, balcony, laundry room, toilet, bathroom, etc., let you breathe fresh air and enjoy a good life After-sales Service: If there is any problem with our products, please contact us first, we will provide you with solution in the fastest time. So why not give it a try? Specification: Material:PVC Size: 6.2*4.5*3.2cm Notes: Please allow slight tolerances in size due to manual measurement, and lighting in photography may result in a difference in color than in real. 1*Drain Valve