The tfx features fully-protected tfo technology encapsulated in a virtually indestructible configuration, impervious to oils, chemicals, cleaning solvents, and ultra-sonic cleaning processes.These sights provide unmatched visibility in all shooting conditions, 24/7, utilizing swiss tritium for maximum brightness.Glowing in the dark without the use of batteries, the concealed fiber cannot be seen by target.Additionally, tru-glo's fortress finish provides a permanent protective coating for maximum protection and this snag-resistant design fits standard holsters.This low mount model is compatible with glock 17,17l,19,22,22,23,24,26,27,33,34,35,38,39,45 excluding mos models.Rear Color: GreenType: Tritium/Fiber Optic SetFrame Material: SteelFrame Color: Nitride FortressFirearm Fit: Glock 34Style: 3-Dot Low SetFront Material: Tritium/Fiber OpticRear Material: Tritium/Fiber OpticFront Color: Green with White OutlineWindage Adjustment: NoElevation Adjustment: NoFirearm Type: Handgun