Cereal box spool roller

I created a spool roller kit that requires minimal material but offers the best possible performance. This project is compatible with spools of any brand and size. I also recommend printing the ball bearing heads with TPU to ensure optimal functionality.Here is the shopping list from Aliexpress for this project: 4 x bearings 608zz https://a.aliexpress.com/_EGIsm6n1 x Silica box https://a.aliexpress.com/_EI4ITNp1 x Hygrometer https://a.aliexpress.com/_EwjyMo31 x PTFE tube https://a.aliexpress.com