The Tritium Pro series of night sights features a 3-dot configuration with front and rear tritium illumination. The front sight features a white front focus lock ring which aids in front sight acquisition during normal daylight hours. The rear sight features a hooked style profile while the rear sight notch features the classic U shape. The housing is made of high quality steel with a matte black finish. If you are concerned about your ability to make quality hits on target during a potential night time encounter then pick up yourself a set of the new Tritium Pro's from TruGlo.Features :Fits: Glock MOS 17, 19, and 35Front/Rear Tritium IlluminationNight Sight Set3-Dot ConfigurationRear Sight Notch is U-Notch Cut