This Front Night Sight comes equipped with a 0.115" Wide Blade and a Flat Base that is optimal for use with a flat-topped slide or for those who intend to file and blend the front sight base to match the contour of their pistol's slide for a seamless installation. Compatible with Novak type front sight dovetail cuts (0.330" x 65 Degree x 0.075") as typically found on both customized and factory 1911 pistols. TECHNICAL INFORMATION: Material: 4140 Chrome Moly Steel Blade Type: Smooth w/ Green Tritium Dot (0.076" Dia) Blade Width: 0.115" Sight Base: Flat Sight Dovetail: Novak Style Dovetail Dimensions: 0.330" (Width) x 65° (Angle) x 0.075" (Depth) Gunsmith installation recommended International shipping not available on this product. IMPORTANT INSTALLATION NOTES: Please be sure you are purchasing the correct sight for your existing slide dovetail. If you are unsure of your factory dovetail dimensions, call the manufacture or do some research to be sure this is the correct sight for your dovetail cut. There are a lot of Forums around the internet that will be able to help with this information as well. THE SIGHT WILL NOT JUST "SLIDE IN" TO EXISTING DOVETAILS. DO NOT FILE ON YOUR SLIDE! Kensight sight dovetails are slightly oversized to provide a factory fit. The actual sight dovetails are larger than your existing slide cut, and this is intentional. Each manufacture has slightly different tolerances on the slide dovetail dimensions. The Kensight sight oversized dovetail will need to be filed and fitted to your particular slide dovetail size. We recommend installation from a competent Gunsmith..