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

Exactly what I needed and works great!

The photo of the connector is different from the product received. The connectors I received have a cavity where there should be none. I think it will cause problems while printing since the Bowden tube will not be supported at the point where it is closest to the hot end.

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

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

One of those things you go through, especially if your new to 3D printing which I am.

Spring Loaded and great upgrade for my low end hotend

You pay for a new and get used. The connectors are not as showed in pictures.

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

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.

These nozzles are nice with good packaging. Didnt have any problems with connections to the Biden tube of my 3d printer. I would recommend these without a doubt!