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

Not much to say, I bought these fittings to work with 4mm OD PTFE tubing on a 3D printer. They work as expected.

Works as advertised.

This products photos are misleading - they clearly show the fitting as having a beveled and tight interior edge, yet the fittings that arrived have an open interior Thats an issue, as the open interior allows the PTFE tube to move more freely. More movement directly leads to a shorter lifespan of the fitting and can also cause issues with filament loading We run a printer shop with twelve printers running continuously and I need parts that are dependable, not fittings that will wear out over the span of twenty hours of printing Please either update your listing photos or start sending out fittings with beveled edges. As it is, i can only recommend these as a cheap and temporary fix

Purchased this pack to replace a broken connector on my sons Creality Ender 3 Pro. This popped right in and had him back up and running within minutes. Construction seems at least as good as the original part, maybe even a bit better. And since its a large pack, we have plenty of extras if it fails in the future!

Works well in my Anycubic i3 Meg-5 3D printer.

I am using these connectors with PTFE tubes on my various printers and so far theyve been perfect. No issues, and the product quality seems excellent.

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.

The fittings I received are NOT the ones shown in the photos. The ones in the photos show FUSUN 4 is printed on the black release cap, but the ones I got have DONT stamped into the plastic. The DONT ones are very cheaply made and are famous for not releasing when they should and, on the extruder, often breaking and releasing filament to pile up everywhere. They will work for a while but thats all I can give them. Go for the WITBOT ones instead.

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.

These seem to be good replacements for the hotend of the Creality Ender 3. They are solid, made a good connection, and had some sort of tape around the threads for a better connection.