GP's in-house made CNC 6.5" Flush mount Speaker Rings.

Inner Diameter: 5.85"

Flush Diameter: 6.8"

Flush mount depth: 0.3"

Outer Overall Diameter: 7.5"

For 6.5" Speakers with a mounting diameter of 5.85" or smaller. 

Also fits Deaf Bonce M61AE & M60SE and many others.