Trijicon Fiber replacements feature similar fiber optic materials used in several Trijicon fiber optic scopes and sights, including the battle-proven ACOG. Trijicon Fiber replacements are purposely engineered to bring the absolute brightest aiming point while retaining strength and maintaining a refined sight picture. Trijicon Fiber Sight replacements are 0. 060" in diameter and will work with any fiber sights on the market that accept this diameter fiber. Includes: - (3) Red Fiber Sticks (2" long)