The long eye relief, locking diopter, and fully multi-coated lenses are just a few of the reasons this riflescope will be a crowd pleasing favorite. Tough construction and bright images are just the icing on the cake. It&';s matte black anodized single-piece aircraft-grade aluminum tube is nitrogen-purged and o-ring sealed for waterproof/fogproof/weatherproof performance. SPECIFICATIONS: Removable lens covers Dust cloth Magnification 3-9x Objective Lens Diameter 40 mm Eye Relief 3.8 inches Field of View 34.1-12.6 ft/100 yds Tube Size 1 inch Turret Style Capped Adjustment Graduation 1/4 MOA Travel Per Rotation 15 MOA Max Windage Adjustment 60 MOA Parallax Setting 100 yards Length 12.0 inches Weight 14.8 oz