Sword Maximus Sight Black 5 Pin .019 RH. 625" inside diameter round aperture. Accepts 1.75" diameter lens. Includes laser etched elevation and windage scales rheostat LED light kit 3rd axis adjustment high and low sight mounting system with built-in offset for extended sight window and an anodized matte black finish. Package Contents: Sword Maximus Sight 100 percent CNC T6061 aluminum construction featuring micro adjust elevation and windage tool-less feature on windage and elevation adjustment and a 1.625 inside diameter round aperture. Accepts 1.75 diameter lens. Includes laser etched elevation and windage scales rheostat LED light kit 3rd axis adjustment high and low sight mounting system with built-in offset for extended sight window and an anodized matte black finish.