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

The item does not match the photos. I specifically purchased these because I thought the bottom was flat, not recessed.

I used these to build out direct drive hotends for my printers and they are much better than the factory fittings. These PTFE tube connectors are pretty standard, so no surprises here.

As others have noted, these are cheap. It seems about a third will not release the tubing when depressed.

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

Worked with my Prusa mini 3D printer!

Perfect for my Tevo Tornado!

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

Bought these for use with my 3d printer and the ptfe bowden tubes. Nice upgrade from the couplers that came with my e3d chimera. Spring loaded which eliminates the need for bowden clips.

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.

These are a must have if you are trying to keep your PTFE tubes for the Prusa MMU2s unit. Use them for all connection spots on the setup (15 total) and removal and adjustments are a breeze.