MFR # TG8539SB
Waterproof / fog-proof / nitrogen gas-filled.
Generous eye relief.
Fully-coated lenses provide maximum brightness, clarity and contrast.
Removable lens caps included.
Coin-style windage and elevation adjustment under screw down caps.
Durable leaf spring for windage and elevation adjustments.
One-piece tube made of aircraft quality aluminum.
Durable, scratch-resistant, non-reflective matte finish.