Orange Outline, 140" Wide Front, 180" Notch, Green Tritium I-Dot Rear. Utilizing a dot over dot configuration, the Ameriglo i-Dot Night Sights have an extended rear sight for increased sight radius with a glare reducing undercut rear face. An excellent design for all shooters, the i-Dot sights provide a quick and easy vertical sight alignment. For Glock 17, 19, 22, 23, 24, 26, 27, 33, 34, 35, 37, 38, 39