The TRUGLO TG131NT3 TFO Green Tritium Fiber Optic Sight Set features a unique combination of tritium and fiber optic elements to provide a bright sight picture both day and night. This sight set includes a square front sight and a U-notch rear sight, designed for 1911 models, specifically the 3" Officer and 4.25" Commander .45 ACP. The fibers are 0.060" in diameter, ensuring a sharp focus on the target.Key FeaturesIncluded Components: This sight set includes both a front sight and a rear sight.Material: Assembled in the USA with Swiss tritium for enhanced durability and illumination.Design: Features snag-resistant design for compatibility with standard holsters.