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

This supplier first delivered the wrong connectors, shipped the PC4-M6 connectors instead of the PC4-M10. The next day I had a new shipment of the correct connectors, but after seeing flakes of the chrome plating in the bag I started testing each connector to see if they would actually lock on the bowden tubing and found that only 6 of the 10 connectors would even work. The other 4 would not even grip the tubing at all, so a big failure in quality control of the picked connectors. Not very happy with the connectors that were supplied, but they were quick to replace the incorrect shipment. Update: The seller is going to send another replacement set of connectors as soon as possible to makeup for the shipping mistakes and the defective connectors. They are making a clear effort to make sure Im satisfied with my purchase and their customer service.

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

These grip the tube too hard and tend to create ridges in it that makes removal hard.

Quality connectors for my E3D bowden system.

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!

Much better than the factory connectors!

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.

Works as advertised.

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.

After deciding to take a chance with these since they were recommended in a Creality message board I almost instantly regretted it. I had made several flawless prints with the stock connector on my CR-10s Pro using PETG filament and then the connector broke. I then threw one of these on and set up my next print. 5 minutes into the print nothing was coming out. Naturally I thought the nozzle was clogged so I went to pull the filament out but it wouldnt budge. I unscrewed the connector amd found that the ptfe tube was sitting crooked inside the fittingand the results are shown in my picture. The filament was pinched and spooled up inside the cavity. I tried feeding the tube at different lengths through the connector and tried 4 different connectors amd they ALL had the same results, crooked tube and pinched filaments. TLDR: These connectors cause jams. I have never had anything like this happen before with the OEM connectors. These went right where they belong, the trash.