Drain Backflow Preventer, One Way Valve, 4 Pack Adjustable Silicone Drain Backflow Preventer, Sink Floor Drain Trap for Pipes Tubes in Toilet Bathroom Kitchen(37-41mm Hole,95mm Depth)

【APPLICATION RANGE】Widely used for Pipes Tubes in Toilet, Bathroom, Kitchen , Floor and more., 【PRACTICAL FUNCTIONS】The floor drain filter adopts an automatic closing design to seal stinky smell and odor from sewage gas; Prevent the drain water from backing up to the room; Anti- water leakage and overflow., 【PREMIUM DESIGN】When the water into the ground drain, the gravity of the water will open the bottom of the ABS gasket, dripping unimpeded., 【ENVIRONMENTAL CONCEPT】Made of high quality silicone, with good heat resistance and cold resistance. No smell and no toxic,No worry about deformation after stretching., 【EASY TO INSTALL】Plug and play, fast drainage, adjustable Size. Note: Please be sure to measure the size of your own drain before buying.