CVLIFE Tactical 3-9x42E Optics Hunting Rifle Scope Red & Green Illuminated Crosshair Gun Scope with 20mm Free Mounts Magnification: 3-9x;Objective Diameter: 1.57" (40mm); Eye Relief: 3.76"-4.13" (95.5mm-105mm) Length: 11.57"(293.8mm);Tube diameter: 1"(30mm) With the fully coated optical glass, the rifle scope would give you a bright and high-contrast image. Made of high-strength aluminum alloy and with its one-piece tube construction, the scope is definitely for greater strength and durability. Inert gas purged, fog, shock, water proof Illuminated Level: 5 Intensity (Red) and 5 Intensity (Green)