This spool holder is designed to handle filament spools that are too small or too large for the Centauri Carbon 2 spool holder.

Easy to attach, just slide off the Elegoo holder and slide on this one. Quick swap, no tools needed. 

There are 2 versions, a 75mm long spool holder which accommodates almost all filament spools, and a 100mm long one for those really odd wide spools if you need it. I have included numbered 75mm 2-color versions and unnumbered single-color 75mm and 100mm versions.

The spool holders can handle spools with a hole as small as 30mm and as large as can fit on the side of the printer.

I have printed these in PLA, and in PETG. I do not think the filament type is critical.

if you are slicing this yourself, the only setting I think is important is 6 walls for strength at the attachment point and repeated stress handling.