I created these to make it less messy and easier to get in to right spaces where my fingers couldn't fit. They are for adding grease to the solid rods that various parts travel on. My delta printer uses 8mm rods and that's what I designed this for my they'll work for other sizes as well. You could scale them to fit anything you like.

Print Settings

Printer:

Flux 3D Delta

Rafts:

Supports:

No

Resolution:

Infill:

20%