Beileshi Tactical 3-9x32 AO Rifle Scope, Red/Green Illuminated Mil-dot Reticle, Flip Up Scope Covers, Quad Lock Detachable Rings Magnification: 3-9X, Objective Diameter: 32mm, Tube Diameter: 25.4mm/1 inch. Field of view (ft.): 13~39, Eye Rifle (in.):2.6~3.5, Exit Pupil (in.):3.6-10.7. Built on True Strength Platform, Completely Sealed and Nitrogen Filled, Shockproof, Fogproof and Rainproof Red/Green Dual Illumination for Versatile Applications, Large Field of View and Most Accommodating Eye Relief for Optimum Critical CQB Mission 1 Inch Tube with Emerald Coating for Maximum Light Transmission, Range Estimating Mil-dot Reticle for Optimal Aiming and Shooting Performance