CVLIFE Tactical 3-12x42E Rifle Scope Red & Green Illuminated Crosshair Optics Hunting Gun Scope with 20mm Free Mounts Magnification: 3-12x;Objective Diameter: 1.65" (42mm); Eye Relief: 4.13"-3.15" (105mm-80mm) Length: 11.19"(284.3mm);Tube diameter: 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).