6.5" Inch Speaker Ring/Spacer

thingiverse

Here's a 6.5" speaker ring, also known as a spacer or some people call it a flush mount ring for grille cover. The outer ring is an optional addition that slides onto the inner ring, allowing you to achieve a seamless flush mount with a grille on your speaker, just like shown in the image. For a solid item, glue the outside ring to the inside ring.