Cardboard Spool Adapter – Fits Standard Spool Mounts

This adapter is designed to fit cardboard spools onto a standard spool mount. 
I tested it with esun cardboard spools and the cardboard spool shown in the image. 
It ensures smooth filament feeding by preventing the spool from touching the PTFE tube holder when using a top-mounted setup.
 

🔹 Why use this adapter?

• Prevents friction and wear on the spool and PTFE tube holder.
• Ensures a smoother filament path for more consistent printing.
• Easy to print and install—no additional hardware required.