Kensight Bomar BMCS & Rollo Pistol Sight Elevation Spring Set Black. Outer spring dimensions: 0.220'' long x 0.154 dia ; Inner spring dimensions: Inner spring dimenstions: 0.212'' long x 0.100'' dia 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 Bomar BMCS & Rollo Pistol Sight Elevation Spring Set: Manufacturer: Kensight Gun Make: 1911 Platform Gun Model: 1911 Color: Black Fabric/Material: 4140 Chrome Moly Steel Gun Type: Pistol Mount Type: Dovetail Package Contents: Kensight Bomar BMCS & Rollo Pistol Sight Elevation Spring Set What firearm models does the manufacturer say Kensight Bomar BMCS & Rollo Pistol Sight Elevation Spring Set is compatible with? The manufacturer suggests that Kensight Bomar BMCS & Rollo Pistol Sight Elevation Spring Set is compatible with 1911Kensight 840220: Bomar BMCS & Rollo Pistol Sight Elevation Spring Set Black