5mm shafts for Voron 2.4 pins mod development. The lengths of the shafts are compatible with hartk1213's modification:
github.com/VoronDesign/VoronUsers/printer_mods/hartk1213/Voron2.4_Trident_Pins_Mod
You can also choose the version that fits the Ramalama2 front idler:
github.com/Ramalama2/Voron-2-Mods/Front_Idlers
The diameter of the shafts may vary between 4.95mm and 5.00mm, so you may need to slightly sand it down for it to easily pass through the bearing. The shafts come from the source indicated by hartk1213.