Anti-Backflow Silicone Drain Plug, Odor-Proof Drain Siphon, Sewer Pipe Seal for Washing Machine and Home

Variable diameter design, can be connected to a 24-32 mm drain pipe. Enhanced dual odor-proof function: the drain pipe and sealing ring fit tightly without any gaps. Plug and play, suitable for most pipeline installations. Opens automatically when draining and closes automatically when not draining. Made of environmentally friendly silicone, soft, elastic, durable, and resistant to aging.