Ewigkeit PC4-M6 Pneumatic Fitting Push to Connect + PC4-M10 Straight Quick in Fitting for 3D Printer Bowden Extruder (Pack of 20pcs)

This are the ones! These are a direct replacement for the extruder and hot end on an ender 5 pro! Work amazing, fixed all my issues with stringing and retraction issues! Grips the bowden tube great and the quality of the fittings are top notch. Highly recommend

Used this for my ender 3, they work for a little bit then the blue cap loosens and it needs to be replaced. There are so many that it is okay but its frustrating.

These are great couplers to have and a great upgrade to stock printers

Worked well to fix under extrusion

Nozzles work great as a direct replacement on my Prusa printer. Had no problem changing out the existing one that got damaged from a stupid mistake. After recalibrating for the new size, I was up and printing. Seems to hold up so far pretty well with both PLA and PETG.

Wouldnt hold the extruder tube, thought maybe it was a fluke but after 6 fittings failing pretty sure its not a fluke

Great quality fittings, I use these to replace the cheap ones Creality uses for every printer, as soon as I assemble them. The tube will wear out before the metal teeth do.

Seem like good fittings replaced both stock fittings with these

Works great on creality ender 3 and cr10s pro. Need replacements for factory ones after waking up to a 8 hour o ernight print that the fitting failed and bowden tube slipped. These are better then the factory ones feel alot stronger. I always keep them as a back up. Great product.

No surprises. Happy with the quality.