The 3-9x40mm configuration provides big game style performance for rimfire rifles. It is designed to allow you to take your rimfire rifle to the maximum of its capabilities and to provide extreme versatility. Weaver style rings included. Product Features Fully coated lenses allow the finest of details to be visible Finger tip adjustable capped turrets for easy in-field, no tool required adjustments Weaver style rings included for quick mounting Aggressive new design provides superior grip and classy look to adorn any rifle Waterproof / Fogproof / Shockproof - Will survive the elements Product Specifications Power/Obj. Lens: 3-9x40mm Field of View: 32-11 ft. at100yds. Lens Coating: Fully Coated Focus Type: Fast Focus Eyepiece Parallax Setting: 50 yds. Eye Relief: 3.5" Reticle Type: Truplex Windage/Elevation: .25 MOA Tube Diameter: 1" Weight: 11.6oz Length: 12.2" Finish: Matte Black Exit Pupil: 14/4.4mm Model: TRF3940