Kensight GI Series Fixed Tritium Pistol Night Sight 1911 A1 Mil-Spec Gov't Model Rear Black. This is a 0.200'' tall rear sight in which pairs nicely with a .150'' tall front sight on a 5'' slide. The sight includes two 0.076'' Tritium dots with a white outline. TECHNICAL INFORMATION: Material: 4140 Chrome Moly Steel Finish: Black Oxide Rear Sight Blade Type: Smooth - Tritium Night Sight Rear Notch: .118x .115Sight Dovetail: Factory ''GI'' Government Dovetail Dovetail Dimensions: .348'' x 65degrees x 108'' Authentic Kensight Sights - The Professional's Choice This is an authentic Kensight sight and not to be confused with other brands. When it comes to durability and features the Kensight sights far exceedcompetitors.sights are Wire-EDM machined from a single billet of 4140 chrome-moly steel. The result is a precision sight built with better materials and the Wire-EDM construction ensures the tightest tolerances possible. This translates to ultra-smooth adjustments audible clicks for both windage and elevation and consistent dovetail dimensions in which the ''industry standard'' CNC construction cannot compete. Backed by Limited Lifetime Warranty Kensight 1911 sights are premium quality and the first choice for factory-fit OEM manufactures competition shooters and professional's worldwide. Specifications for Kensight GI Series Fixed Tritium Pistol Night Sight: Manufacturer: Kensight Color: Black Front Sight Color: Green Rear Sight Color: Black Fabric/Material: 4140 Chrome Moly Steel Gun Type: Pistol Front Blade Height: 0.315 in Height: 0.315 in Illumination Type: Tritium Condition: New Features of Kensight 1911 A1 Mil-Spec GI Series Government Model Fixed Rear Night Sight: Finish: Black Oxide Rear Sight Blade Type: Smooth - Tritium Night Sight Rear Notch: .118" x .115" Sight Dovetail: Factory "GI" Government Dovetail Dovetail Dimensions: .348" x 65" x 108" Package Contents: Kensight GI Series Fixed Tritium Pistol Night Sight Kensight 860202: GI Series Fixed Tritium Pistol Night Sight 1911 A1 Mil-Spec Gov't Model Rear Black