HIVIZ sights are machined from solid steel and feature fiber optic LitePipe inserts for increased visibility and faster sight acquisition in all conditions. Includes interchangeable lite pipes. FeaturesLITEWAVE interchangeable LitePipe designIncludes green, red and white LitepipesAll steel constructionLitePipe diameter 0.070"Windage and elevation click adjustment Note: Fits Ruger Mark I, II, III and IV pistols; 22/45 with adjustable rear sight including the 22/45 LITE