Ender 3 universal spool holder
thingiverse
Universal Spool Adapter for Stock Ender 3 Holder The 3-spiral arm design allows for seamless adaptation and support of a wide range of spools with varying internal diameters. To utilize this adapter, simply print two units and attach them to both sides of the spool, then place the modified spool on the standard Ender 3 holder.
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