The bright and ultra-durable HiViz LiteWave sight will enhance your confidence and shooting experience for the Colt or Rock Island 1911 Pistol. It features an all steel frame and interchangeable LitePipes. Blade Width: 0.125. Blade Height: 0.180″. LitePipe Diameter: 0.090″. Replacement Litepipe Handgun version #5. This model is compatible with your 1911 with Novak style dovetail 0.330″ x 0.75″ x 65 degree. Front Sight Length: 0.750″. Front Sight Width: 0.340″. Front Sight Height: 0.260″.