BIQU PC4-M10 Pneumatic Connector Fittings Bowden Tube Coupler Male Straight PTFE Tube Push for E3D-V6 Bowden Extruder 3D Printer (Pack of 10pcs)

Spring Loaded and great upgrade for my low end hotend

These connector are not of a standard size or thread pitch. If youre intending to mate these to standard metric hardware, youll have issues. If its your intent to use these as a custom fit, they may very well work for you, just dont expect to find nuts or threaded receptacles that will accept them.

Theyre a snug fit for 4mm OD PTFE, perfect for dry boxes.

Bought these to replace the ones that came with my 3D printer and they work great very good quality and well-made. I obviously only needed to so there are many here to replace others in case I need to on Down the Line but the two I used are working great for the time being.

Purchased to replace improper functioning Creality CR-10S hot/cool end unit. None of these would release Bowden tube either! New Bowden tubes, same results. These were to blame due to poor removability of Bowden tubes.

i used these to replace the stock plastic parts on my Rep2Box. also adding them to my MMU2, after i print out the adapters

Setup to replace the one on top of my Tonxy X5S after it exploded off after a jam. This set appears to be good quality, solid, and works well. All have good spring action in the cuff, and the one in use is doing its job perfectly.

Great pass thur for ptfe tubes. Used on my mmu2 unit and mk3 extruder filament cover.

Quality connectors for my E3D bowden system.

I have yet to encounter a connector like this where the small metal teeth internally dont break after some use. While these seem to hold up better than some, they still fail reasonably quickly. Its a good thing they come in large quantities for cheap.