30mm Tube for Maximum Light Transmission and Wider Windage/Elevation Adjustment Unique One Piece Tube Construction Provides Superior Shockproof, Fogproof and Waterproof Capabilities, Completely Sealed and Nitrogen Filled to Prevent Fogging Side Wheel Parallax Adjustment - New, Convenient and User Friendly Feature, Allowing for Easy and Precise Objective Adjustment - FROM 10 YARDS TO INFINITY Zero Locking and Resetting Target Turrets with Larger and Consistent Windage/Elevation Adjustment Range- EXCEEDS 30 MOA IN EACH DIRECTION Complete with Sun Shade and Flip-open Lens Caps