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

worked better than the stock ones that came with my printer. definitely will buy again if I need more.

I am using these connectors with PTFE tubes on my various printers and so far theyve been perfect. No issues, and the product quality seems excellent.

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.

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

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

I used these with a replacement part for my prusa MMU2s. They hold the ptfe tube perfectly and actually make the mmu work. Would buy again