This spool holder was made as a replacement to the prusa mini spool holder. I was getting annoyed that ever time I had a spool with a different thickness I had to change how thick the spool holder was. So to fix this annoyance I made this simple spool holder. It uses the 3 of the longer screws and 3 nuts that come with the prusa mini spool holder. If you have the screws and nuts it should also work as a spool holder for a different printer.