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, black and white LitepipesAll steel constructionLitePipe diameter front sight 0.090, Rear sight 0.078Rear sight height 0.224, notch width 0.140, front sight 0.215 tall by 0.120 wideReplacement LitePipe Handgun version # 6, rear interchangeable litepipe DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.