Ultimate Arms Gear 2.5X20 P4 Mil Dot Rangefinder Long Eye Relief Scout Rifle-Pistol-Gun-Shotgun Hunting Sniper Sporting Tactical Scope + 7/8" Scope rings, See Thru Lens Caps, & Lens Cleaning Kit Magnification- 2.5X Fixed Crystal Clear 20mm Lens . Tube Diameter- 1" P4 Mil Dot Rangefinder Reticle allows the shooter to estimate range of target Full Windage and Elevation Adjustments Nitrogen Filled, Shockproof, Fogproof, and Water Resistant