A spacer/guide ring for the feed tubes on the Lee Precision Universal Case Feed system. Provides some support for the tubes and prevents them from flopping around when you pull the tubes out of the base, which also makes reinserting the tubes in the base easier.
The spacer ring has been designed with very tight clearances, which is necessary for it to function as intended. When installing the spacers, I recommend first running a single tube through each of the four holes on the spacer to make sure it fits; it will be snug. Make sure to clean up any stringing or crud inside the tube holes of the spacer before attempting to install. I recommend printing and using two spacer rings, spaced equally on the tubes as shown in the photo.
The author marked this model as their own original creation.