Trijicon GL01Y for Glock 3 Dot Set Yellow Rear Black bright & tough night sight set/fit Glock models: 17, 17L, 19, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 34, 35, 37, 38 and 39 Green front and yellow rear Self Illuminating/no batteries Required Extra large front dot/tritium-illumination technology Made in United States