Trijicon Bright & Tough Night Sights are three-dot iron sights that increase night-fire shooting accuracy by as much as five times over conventional sights. Equally impressive, they do so with the same speed as instinctive shooting - and without the need for batteries. Housed in a metal body and cushioned within silicone rubber, Bright & Tough Night Sights feature a unique shock-resistant design. Each lamp is capped with a sapphire jewel to help evenly distribute the light while protecting the lamp from solvents and puncture. Contained within aluminum cylinders for additional protection, the lamps are mounted on silicone rubber cushions to withstand shock and heavy recoil. Green lamps are warranted for 12 years from the date of manufacture.Specifications: Fits Model: Colt Govt. 1911, Combat Elite, Delta Elite (made after 1988) Front Lamp Color: Green Rear Lamp Color: Green Front Paint Color: White Rear Paint Color: White Front Blade Width: 0.125 in. (3.17mm) Front Blade Height: 0.185 in. (4.69mm) Overall Front Blade Height: 0.36 in. (9.14mm) Rear Notch Style: Square-Notch Rear Notch Width: 0.125 in. (3.17mm) Rear Blade Height: 0.195 in. (4.95mm)