Variable magnification 2 to 7 power. BSA Air Rifle scope with Nitrogen filled chambers, machined aluminum construction, waterproof, shockproof and fogproof! Tube is 1 diameter, aluminum construction, dual braced lenses, adjustable objective lens can be set parallax-free down to 7.5 yards.• These scopes are built to handle the unique reverse recoil of today"s magnum spring power air rifle. They all have adjustable objectives that focus down to 10 yards. All AR models have target style turrets with finger adjustable 1/4MOA clicks for windage and elevation.• Specifications: Magnification: 2x-7x Objective: 32mm Field of view: 36.2-11.5ft @ 100 yds Eye relief: 3 Tube diameter: 1 Length: 12 Weight: 15.9 oz Finish: matte black Reticle: duplex Adj size: 1/4 MOA @ 100 yds