SummaryHi, This is a spool hoder for little printer such as Fabrikator mini. it's design for printing surface as 80 mm. Just need 4 bearing 7mm large, 22 mm outside diameter and 8 mm inside diameter. It's a very comon bearing and you can find a pack for under 10 box on amazon. You could use metal axes, or print the axis enclosed, but I recommande to buy a 8mm axis with 2 bolt. Print 2 males, 2 femelles, 4 axis (optionnal)Print SettingsResolution: 0.2Infill: 30How I Designed This