The AmeriGlo I-dot Night Sight Sets are ideal for the person who is looking to increase their speed on target in a defensive situation. The I-dot configuration utilizes a dot over dot method for quick vertical sight alignment and fast target acquisition. The I-dots also provide you with an extended rear sight for a bit extra sight radius and a glare reducing undercut rear face. This is a superb design for all shooters. The sights are housed in a steel frame which features a matte black finish. This set has a green tritium front sight with white front outline and a green tritium rear with square notch. Features: Green tritium front, 0.140 inches wide with white front outline Green tritium rear, 0.165 inches wide with square notch Quick vertical sight alignment Fast target acquisition