Plastic Tube Expanders or Plastic Tube Expander Plugs, Plastic Expanders for Tube, Expanding Tube Connectors, Expandable Tube Bungs, Tube Expansion Plugs, Pipe Expansion Bungs, Winter Plugs, Rubber Tube Seals and Expand to Fit Plugs. This range have wide variety of applications including being used as a connection system allowing one tube to connect to another via the motion of the thread, which expands the internal fitting plug making it grip tight inside the tube. Another application is to be used as a Seal, particularly for Pipes and Tubes in cold weather where the expansion motion is driven by the Thumbscrew.
