Large Spool Spacer to use Adjustable Spool Holder

One of my favorite models is Humebeam's Adjustable Spool Holder for Silica Gel 

I have printed dozens of these, but some of my spools have a large opening and these spool holders don't fit. To solve this, I created a simple spacer. If you have a spool with a larger opening anywhere from about 72mm-78mm, this adaptor will help you use the spool holders linked above.