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

Mine was missing the cutting tool.

No issues, high quality connectors

Tried to print several different project with different filament. Each one would jam after about 4 hours of printing. Print started out great, but then no filament would come out. Wasted time and money.

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

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!

The usual white Teflon tube scorches upon reaching 250 degrees. Nothing happens to this other one (the blue one)

Totally happy with this product. Really good cutter

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.

came in fast and product as described.

Replaced a stock bowden tube with this, done 50 print hours so far and everything is going great.