Rifle scope 3-9x magnification 40mm objective lens 25mm tube (.98") NOTE: Exterior tube size is 30mm due to rubberized coating 1/4 MOA (1/4" click value @ 100 yds) Mil-dot reticle (red-green illuminated) 100 yds parallax setting 39.3' to 13.1' field of view @ 100 yds 3.0" to 3.3" eye relief 10.0mm to 4.4mm exit pupil 19.6 oz 13.6" long Includes Weaver rings, flip-open lens caps, sidewheel rheostat & CR1620 3-volt lithium battery. Other features: True Strength scope +/- 40 MOA windage & elevation adjustments Rubberized exterior Nitrogen-filled Shockproof Fogproof Rainproof