YOOPAI PTFE Teflon Tubing 5m with Cutter, 2.5mm ID × 4mm OD PTFE Teflon Tube Fits Direct Drive Extruder 3D Printer, for Bambu Lab A1/A1 mini/P1P/P1S/X1C for Creality K1/K1 Max/Ender 3 V3 (White)

This is great for moving filament from your storage unit to the printer. The larger inner diameter of 2.5mm GREATLY reduces friction on the filament, which makes a big difference with abrasive filaments like glow in the dark or wood grain filament. Outer diameter is still 4mm so existing connectors hold it in just fine.Installation is easy with the included cutter, just cut it to whatever length and replace your old PTFE tube.I've been happy with the quality so far- ran lots of abrasive stuff through it and it still feeds 'difficult' filaments like soft TPU just fine.One caution- you ONLY want to use this *before* the extruder. IE, from spool to printer. If you use it AFTER the extruder, IE as the Bowden tube in an Ender 3, the filament will have a lot more 'give' and that will reduce the accuracy of the prints. However used before the extruder gears- from spool to printer or printer to print head, the functionality is perfect and filament feeds much more smoothly.Keep in mind with the thinner walls it can kink more easily, so if you're hooking up the extruder on a K1 series printer with this you might want to print a support of some kind for it.Definitely recommended!

Works as expected. The Yoopai PTFE tubing and cutter that was included was a nice touch and worked perfectly. Needed to replace the PTFE tubing that was on my BambuLab A1 mini AMS Lite combo because I also bought an A1 and use the AMS Lite more with that. The tubing it came with was fine with the A1 mini but not quite long enough for using with the A1. This kit fit the bill perfectly to cut longer tubes. Tubing was defect-free and working really good so far. Bought a couple other items from the seller and all have worked perfectly for what I needed so will keep them in mind for other products.

Read a few negative reviews on this, but I have to say I haven't experienced the problems(s) others have. The teflon tubing stays seated and doesn't pull out and my filament glides through it very easily with just a small amount of room to spare.Nice little cutter they send with it as well! Very happy with my purchase!

fast shipping and reasonbly pricedthe tubing works great and the cutters are ok, still crimped the tubing a bit but they work

If using for your 3D Printer, this is what you want. It has a 4mm Outside Diameter with a 2.5mm Inside Diameter which is the proper size for standard 1.75mm filament. 2.0mm Inside Diameter is too small, and 3mm Inside Diameter is too large.

I wanted to replace the PTFE tubes on my Bambu A1 and place the AMS a bit further from the printer. These tube did the job. I have not had any problems with filament passing thru the tubes to the print head. Quality product!

great quality easy to use cut to size perfect fit every time helping my printer keeping the filament moving smoothly

I bought this to add some mods to my AMS, and found the tubing to be well made.The cutter works surprisingly well, and is a welcome addition.