This is a spool for small amounts of filament. I found myself buying 10m lengths of filament and not knowing how to spool it to the printer. Existing spools seemed both huge and very slow to print.
This spool consists of two parts: a hub and three identical arms that clip in.
There are two types of arms - straight and curved.
The spool is designed to fit onto the Ultimaker 2 Filament Holder for Reels With Smaller Diameter Holes at http://www.thingiverse.com/thing:221644
The hub has an elongated central tube so that three spools can fit onto the holder at the same time.
I have also made a standard hub with a clip for attaching to the side of a printer. The spools can be changed on this one.
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