Small filament spool (multiple sizes)

This is a small filament spool, usable for sample filament or leftovers from large spools. Outer diameter 100mm, inner hole diameter 40mm.
Multiple heights can be constructed by printing the appropriate parts. For example, a 30mm high spool can be made from two 15mm parts, or from a 20mm part and a 10mm part. All heights between 10mm and 50mm in 5mm increments are possible. The two parts need to be glued together with a glue appropriate to your material.
I suggest changing your wall print settings to the spool center consists of only walls, or going for 100% infill.