The Blackwing ID Rings from Duclos Lenses are a simple solution to aid in identifying the unique tuning of various Tribe7 Blackwing primes. The rings come in three different styles: T-tune (silver finish), S-Tune (gold finish), and B-Tune (red finish). The rings provide a vibrant, easy-to-identify color system as well as an engraving on the smart and dumb side of the lens. The Blackwing ID Rings can be easily installed with no disassembly required, held in place with just a few set screws. Keep your Tribe7 Blackwing primes organized and easily identified with this simple solution from Duclos Lenses.