PTFE Teflon tubing 10ft- 2mm ID X 4mm OD for 1.75 Filament Bowden 3D Printer -Allen Tech PTFE Teflon Tube

Some 1.75mm Filaments for 3D printing are NOT 1.75mm some are actually up o 2.1mm meaning your common 4mm OD / 2mm ID tube won't cut it. Glow in the dark, word, carbon fiber, etc. can be greatly varying diameters and the run of the mill PTFE tubing won't work. I bought this and works fine with one caveat; make sure the spring teeth in you hot end assembly is tight of the thin PTFE tubing that this is may pull loose.

I was having trouble with my Bambu P1S, poor first-layer adhesion. Finally tracked it down to too much resistance with the more expensive tubing I had installed. Swapped to this 3mmx4mm and the filament has far less resistance. Just what I was looking for. Yes, this can kink easier than the thicker tubing but that has not been an issue for me. Also, the thinner tubing makes it easier to see the filament in the tube.The packaging is large and thus the tubing is not wound tight, this causes less curve memory when you install it.Overall very happy with the quality and value.

Good quality bowden tube. Using it to replace the QIDI Plus 4 tube which, to my surprise, was 3mm ID and not 2.5mm ID. This tube is the exact same dimensions as factory. Filament runs very smooth through it unlike some cheap tubes.

Running on a Bambu Lab P1 Series.It's pretty much more see-through than other PTFE white tubes, very useful when loading/unloading.I use it with normal 1.75mm filament, absolutely 0 drag its very slick.Wouldn't suggest to print TPU with this as its not tight fitting, for the diameter mentioned above, but for pretty much anything else its a dream for printers extruder parts. No stress on components when pulling at all.HOWEVER, it is very easy to kink/bend.. if you try. But if accidentally create a bend they give you so much ft just cut and use more.Thermally is ok, I print ASA and chamber temps get 120F inside, and the filament in tube does not feel that heat so it is stiff while it runs through as should be.4/5 starts - (due to tube not being as stiff, not a serious issue at all, but can't say it's perfect)

I needed to replace the small PTFE tube in my Ender 3 KE upgraded hot end. This tube fit perfectly and dimensions matched the original. I only needed a small piece, but the extra will be nice to have on hand. Highly recommended!

This is good to run between a spool (or filament dryer, like I did) and an extruder, as it's very loose and won't add appreciable drag while your extruder is pulling the filament. Because it's less draggy, it's better for this purpose than what you'd place between an extruder and hot end.However, it's useless for a "regular" Bowden setup (between extruder and hot end.) The ID (inside diameter) is too wide, allowing the filament too much freedom to move around at random angles, effectively changing the amount of pressure according to where the nozzle is, and that's no good. I tried that and found that it lead to weird inconsistencies in finish, especially at the top layer. So, for a regular bowden setup, use something with a slightly narrower ID.

Best price I could find

Tubing is as advertised. Make sure to opt for Amazon packaging.I ordered two rolls. One was fine, the other was completely flattened rendering it useless.