100g size filament spool
thingiverse
This is a two piece filament spool that has a mass of about 30g when printed in PLA. It can hold about 100g of filament. I use these for holding samples of filament as well as the leftovers from larger rolls. The tubes for holding the filament start/end are sized to accept 1.75mm filament. Print each half flat. They should screw together easily.
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