About this 3D model

It's made for standard 4mm PTFE tubes for 1,75mm filaments. It works like a charm. I use a candle and I let the filaments cool inside by blowing on the tube maintaining a slight pressure to keep them attached together. When everything is cold filaments are perfectly welded. I printed mine in PETG and I found my spring in a local hardware store. Boost Me Please leave a Boost if you liked the model :)