TruGlo Brite-Site TFX Pro Sig 6/8 Fits Sig #6 front and #8 rear Tritium/fiber-optic day/night sight 24/7 brightness Orange ring on front sight Fully protected TFO technology encapsulated in a virtually indestructible configuration Impervious to oils, chemicals, cleaning solvents and ultra-sonic cleaning processes Provides great visibility in all shooting conditions Utilizes quality Swiss tritium for maximum brightness Front sight FOCUS-LOCK for fast and accurate shooting