Authentic Capricorn Bowden PTFE Tubing XS Series 1M for 1.75mm Filament with PTFE Teflon Tube Cutter, 2X PC4-M6 Extruder Fitting, 2X PC4-M10 Hotend Fitting for Ender 3 V2/3/3 Pro/CR-10 3D Printers

Awesome

I bought this tubing to replace the tubing in the heatbreak on my Prusa mini. The stock tend to shrink over time and need to be changed. Given Capricorn’s 300°C rating, I thought this would be perfect, reducing the number of changes if needed at all. Swapped it out and didn’t get through two hours of a print before I had a clog. Pulled the tube and it had already shrunk 2mm. Thought ok, maybe it was a fluke. Tried it again, made it 10 hours and it clogged again. This time when I pulled it, I could see how much it had widened out and deformed from the temperature. This was printing at a max of 215, usually 205. That should not be hot enough to do this to Capricorn tubing. I am very disappointed. The other parts that came in this kit are just filler as an attempt to justify the price, I am thinking. I’ll make sure to buy directly next time, I guess.

Tubing arrived well packaged with no pinches. The cutter works well, and i had more than enough for my ender 3 v2. I cut mine a little long to account for the tighter inside.

Tubbing is supposed to be for 1.75mm filament, but created high amount of friction when filament inserted. Too much force needed to feed filament through PTFE. Wrong size? Poor quality? Bad manufacturing?

I have had to switch back to my old tubing. This internal diameter is too small. It was unable to push the filament through properly and caused my prints to turn out bad. I could feel the resistance when I tried to push the filament through by hand. Once I switched back, prints came out good again.

It seems like a ton of people in the 3D printing community recommend this tubing because of its tighter inner diameter spec leading to more consistent moments from the extruder. In theory, and when using filament that is exactly 1.75 mm or less throughout the entire spool, this is very true. However, the vast majority of brands will have a variance that goes a little (or a lot) over that 1.75 mm spec at some point in the spool, which is almost guaranteed to cause a jam with this XS tubing. Even if there is only one spot on the entire 300 meter spool that is slightly out of spec, that is enough to cause friction in the tube and for it to cause a jam. At first, I refused to believe that the tubing was causing the issues and thought I might have an extruder issue. I thought maybe the extruder spring was a little too tight causing it to squish the filament while it pushed it into the tube, making it press against the inside of the tubing. So, I replaced the entire extruder assembly and tried many different springs. No change; my machines were still jamming on a daily basis. I tried many different filament brands from Overture, Hatchbox, eSun, Amolen, etc... and all would, given enough time, eventually cause jams on both of my printers with the tubing installed. I also bought some of this XS tubing for my coworker and he experienced the exact same issue. The issue has only gone away when I replaced the tubing on both of my printers with slightly less tight inner diameter spec of 2.0 mm instead of the 1.9 mm this tubing comes with. Ive been printing nearly non-stop now for four days and have yet to experience another jam. Before you disregard this review with, Well, Ill just make sure my filament is to the correct spec. Understand that, even with the filaments that would measure at or close to 1.75 mm in the first few meters I checked, there was no way I could check every mm of the entire 1 Kg spool. All it takes is one spot to be too far out of spec to cause friction in the tube, leading to your extruder forcing the filament through, causing more friction, resulting in your extruder gear crushing the filament to the point it will no longer move at all. Its a snowball effect of friction. Aside from the inner diameter spec being too tight (which is the whole point of this tubing), everything else was fine. The quality of the tubing was great, the consistency of the tubing itself appeared to be flawless, the cutting tool it came with worked well, and the couplers were a nice upgrade over stock. However, almost none of that matters when the 1.9 mm tube diameter shouldnt be used at all for printing if you care about printing reliability.

Tubing works well on Ender 3 pro. As expected good quality tubing

Not sure this is any better, but seems nice and on our second one....

Works as it should.

The picture and description shows 2 sets of tubing connections, but I only got 1 set. It was the connections I needed the most. Very disappointed!