Sterile thermoplastic tubing welder. 2:27 video.
https://www.youtube.com/watch?v=w54dXMHw4co
Previously:
https://www.homemadetools.net/forum/...447#post181817
https://www.homemadetools.net/forum/...591#post162773
https://www.homemadetools.net/forum/...859#post148514
