4mm-4mm OD PTFE Tube Coupler / Joiner
thingiverse
After thoroughly examining the Thingiverse site, where 4mm to 6mm was inaccurately labeled as 4mm to 4mm, I took the initiative to utilize Fusion 360 and made three attempts at building and testing this design. The central section will obstruct the tube while allowing a pass-through for the 1.75mm filament.
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