See this product in video click on the following link: https://youtu.be/2M4cCXYoEKw

PC4-M6 Coupler Straight Pneumatic Push in 3D printer Hotend Connection


This is a spare push in to connect fitting for Geeetech All Metal J-head bowden extruder or hotend, but also designed for


1. PC4-M6 Pneumatic fitting
Inner diameter(blue end): 4mm 
Thread: M6/3mm 
Material: copper and plastic 
Color: golden+blue 


1. Polyurethane or Nylon tubing
2. Quick and Reliable connections
3. Reusable: Multiple connections/disconnections
4. Convenient elliptical sleeve configuration
5. Metallic body made of non-corrosive, non-contaminant Nickel-plated Brass
6. Outside (and Inside where applicable) hexagonal wrench tightening