ALLEN TECH PTFE Teflon tubing 5ft- 2mm ID X 4mm OD for 1.75 Filament Bowden 3D Printer - PTFE Teflon Tube

Very thin but very low resistance for pulling filaments

I have a Prusa i3 MK3s with MMU2S multi-material upgrade. I replaced all of the existing 2mm inner-diameter PTFE tubing (from the spool rewinders to the MMU2S, and from the MMU2S to the extruder) with this 3mm inner-diameter tubing. Now the filament can move more freely through it, and if the end of a retracted filament happens to be somewhat swollen, it avoids the possibility of jamming inside the tubing.

I used this 4mm OD 2mm ID tube to replace the insert in my 2010 Chicago electric 151 mig welder. It works great. They don't sell the replacement inserts for this old welder anymore.

Tubing works well in my A1 Mini 3D printer and AMS Lite. Plenty of it so I don't feel bad about wasting it if I cut it wrong. Seems to be holding up well for the last few months.

Excellent product! I use this for my filament drybox for 1.75mm line and this routes it perfectly. I run this from my drybox to my 10 line manifold and it is bendable enough to make that transition but also very strong!

I used this Teflon for cable housing for the rudder controls on a kayak. Much slicker than vinyl or Poly tubing