Magnetic 3d printer filament spool holder
Description
You can attach this holders on any steel desks. :) Parts list, 1. M4 bolt(length 12mm) x 2 2. M4 nut x 2 3. bearing (thickness 5mm / inner hole 4mm / outer 16mm) x 2 4. magnet (25mm x 10mm x 1.5mm) x 2
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