50 100-600mm Pipe Natural Rubber Drain Air Bag Inflatable Bung Stop Plug Block

  
The inside of the pipe must be cleaned, the surface is flat, and there is no burr. Otherwise it will affect the sealing effect and even pierce the airbag 2. The airbag must be used in the same type pipe 3. Do not use the air bag at the pipe joint, there is a gap at this place, which affects the sealing effect.