Description:[Material] Our drainage pipe sealing ring is made of silicone material with a nice seal and is durable. The plug formed a seal with the tube seated in the plug. Stops the smell from coming back up through the pipe.[Equipped with Plug] The toilet seal ring can be covered with a plug when not plugged into the drain to avoid odors from entering; and there is a pre-drilled hole for connecting to a water purifier, making it easy to use.[Design] Multi-layer thread and flexible design make it tightly integrated into the sewer. The opening where the drainage hose is connected has elasticity, and the opening will be relatively small. It can be installed with slight force. If the drainage hose is relatively large, the opening can be trimmed with scissors.