sample filament spool
thingiverse
I'm using small spools for filament samples, and in the middle I've inserted a paper tube with an internal diameter of 6cm.\r\nThe additional ring allows me to use it with my rewinder, specifically the one available on Thingiverse at https://www.thingiverse.com/thing:3808611\r\nHowever, I've found that spools don't fit properly in the Mega Anti-Tangle Spool Holder.
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