These Truglo TFX Night Sights combine glowing tritium and fiber optics for highly visible sights that encourage rapid target acquisition day and night. The fiber optics of these Tritium Pistol Sights from TruGlo use ambient light and carry most of the load during the day, while the tritium glows brightly at night, illuminating the fiber optics to enhance sighting. Truglo TFX Tritium/Fiber-Optic Night Sight Sets have been updated to be compact and snag-resistant, have a longer sight radius, and be extremely durable. Get the best of both worlds of battery-free illumination with the Truglo TFX Tritium/Fiber-Optic Night Sight Set. Specifications for Truglo TFX Glock Low 17/19/22/23/24/26/27/33/34/35/38/39 Green 3 Dot Sight: Manufacturer: TruGlo Gun Make: Glock Gun Model: Glock 23, Glock 24, Glock 27, Glock 33, Glock 34, Glock 39, Glock 35, Glock 19, Glock 17, Glock 22, Glock 38, Glock 26 Color: Steel, Black, Green Front Sight Color: Green Rear Sight Color: Green Front Material: Tritium/Fiber Optic Illumination Type: Tritium, Fiber Optics Condition: New Country of Origin: USA Features of Truglo TFX Tritium/Fiber-Optic Night Sight Set, Glock, TU-AP-TG13GL1A: First and only of its kind. Fully protected TFO technology encapsulated in a virtually indestructible configuration. Impervious to oils, chemicals, cleaning solvents and ultra-sonic cleaning processes. Unmatched visibility in all shooting conditions 24/7. Utilizes quality Swiss tritium for maximum brightness. Glows in the dark. No batteries required. Concealed fiber can not be seen by target. Fortress Finish provides a permanent protective coating for maximum protection. Snag resistant design. Fits standard holsters. Fits Glock models 17/17L, 19, 22, 23, 24, 26, 27, 33, 34, 35, 38, and 39. Package Contents: Truglo TFX Tritium/Fiber-Optic Night Sight Set, Glock, TU-AP-TG13GL1A