Spool holder for the stock Wanhao i3 Duplicator Plus. Just invert the stock spindle and insert this one. Gives the ability to use wider rolls and offers very little resistance the roll as it turns.
Updated Version of this can be found here:
Print in ABS or PLA. No supports needed. Invert your stock Wanhao Duplicator i3 Plus Spool holder and slide this in to extend the holder and allow use of wider spools.