BIAL Optics Hunting Rifle Scope 3-9x40mm Aoeg Red/Green Illuminated Mil-dot Reticle Crosshair Gun Scope with Heavy Duty Ring Mounts Length: 12.60in Magnification: 3-9X, Objective Diameter: 40mm, Tube Diameter: 25.4mm/1 inch. Hard anodizing multi-coated lenses ensure a good hand feeling and avoid scratching,Lens cover included. Built on True Strength Platform, Completely Sealed and Nitrogen Filled. HydroShield lens coating helps maintain a clear sight picture, regardless of weather conditions