Use this spool holder if you order the eight-color roll of B-30-1000 30AWG solid copper, tinned wrapping wire. Its great wire for a lot of projects but the eight loosely bundled wires are a nightmare to even keep on the original spool.
In total, it's designed to hold a single full roll of B-30-1000 wire (125ft per color).
The eight spools are to be printed in halves, then glued together. (You may be able to zip-tie them as well, then wrap the wire on top of the mini zip-ties.)
Overall assembly tolerances are generous, so all printers can print this.
The half-spool plates require support material if your printer is unable to render circular overhangs very well.
2x M3 screws of any length are suggested in order to keep the axle securely fixed in place.
The optional 0.5mm spacers are also available for printing if desired. Five are typically required to eliminate slop and improve friction.