Wooden spools is cheaper spool compare to steel spool and plastic spools, usually for one time shipping spool, not use for many times.
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300mm Wire and Cable Plastic Bobbin Plastic Reel Spool Bobbin (can be disassembled)
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Steel Cable & Spool repurposedMATERIALS
Cable reel - Wikipedia
China Steel Cable Spool Manufacturers and Factory - ONEREEL
Well tuned, It's scary how clean this printer prints PETG sometimes oO : r/prusa3d
400mm Wire and Cable Plastic Bobbin Plastic Reel Spool Bobbin (can be disassembled)