PC6 to PC4 Adapter
thingiverse
I am using this to connect my filament box which has a 6 mm bowden tube to my printer which has a 4 mm bowden tube.
Download Model from thingiverse
With this file you will be able to print PC6 to PC4 Adapter with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on PC6 to PC4 Adapter.