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

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

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.

I have two Tevo Tornadoes and these fitting are 100x better than the fittings that come as stock. I replaced the existing failed ones and havent had an issue since. I recommend these.

It fit my needs good.

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.

Used them on a 3D printer. Work as intended.

I do not like writing reviews, but like this item

All is OK

Not what the picture shows in the listing, these have a large gap inner diameter allowing the PTFE tube to move around. Do not buy!

Exactly what I needed and wanted, that is a 4mm fitting with a 1/8 British Standard Pipe Thread. The title description says M10 and for pipe the pitch is usually 1 mm but these are not. For 3D printers one of the most popular threads is 1/8 BSPT/ISO 7-1. Between the positive reviews of success and a reviewer claiming that its not really an M10, I bet against the description and bought it anyway: success! The M10 in the description is wrong, but the flats do suit a 10 mm wrench. Usage Tip: These grip some PTFE tubing a bit too well for my taste. One thing about PTFE is that is cold-flows with force and time so once it gets stuck it never comes out. Ive been taming that death-grip by running a needle file through them.