Selected Material: The sewer floor drain cover is made of ABS material, durable and long lasting. Automatic opening and closing design: Seesaw mechanism opens automatically when draining water to ensure smooth drainage, and closes after draining to seal odor and sewer gas, preventing backflow, leaks, and overflows. Blocking Function: A nonslip silicone ring on the edge of the water collector catches hair and debris without blocking water flow; the antibackflow device effectively prevents debris and hair from entering the drain, reducing the risk of clogs. Easy To Use: Plugandplay installation allows liquids to flow into the sewer effortlessly, delivering longlasting performance and serving as an essential sewer accessory for your home. Use scenarios: In a shower or bathroom floor drain to prevent hair buildup and odors while maintaining fast drainage. In a laundry or utility room floor drain to capture debris and prevent backflow and leaks. In basements or other wet areas with floor drains to stop sewer gas and water leaks while allowing normal drainage.