Deodorant Silicone Leak Core Sewer Pipe Control Backflow Preventer One Way Valve for Bathroom Washing Machine Anti-backflow Seal Description: Description Color: Blue Material: stainless steel silicone Size Type A: 50x92mm (suitable for 40-44mm floor drain aperture) Type B: 50x60mm (suitable for 40-44mm floor drain aperture) Type C: 45x95mm (suitable for 35-39mm floor drain aperture) Type D: 38x95mm (suitable for 28-34mm floor drain aperture) Specifications: Features: This cheap device can save you expensive maintenance costs and avoid the pain caused by cockroaches, noise and spills! Prevent backflow: prevent drainage from flowing back into the room; prevent leakage and overflow. Anti-odor and insect-proof: The odor in the sewage is sealed and filtered with an automatic shut-off design. Durable and resistant to rust: no need to worry about deformation after stretching, super flexibility and abrasion resistance Easy to install: Install in seconds without any tools. Widely used: can be connected with underground septic tanks, sewage pipes, used with shower rooms and floor drains in the basement, and can be effectively installed in PVC pipes Made of high-quality silicone, completely environmentally friendly Package Included: 1 * filter screen, 1 * fixed cap, 1 * silicone sleeve