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. Package includes- 3 Red Fiber Sticks