Fixed power scopes developed specifically for rimfire shooters. Scopes have parallax set at 60 yards which is perfect for rimfire shooting. 1/4 MOA windage and elevation adjustments. Multicoat 4 lens system. Waterproof fogproof shockproof. Tube Diameter: 1 . Objective Bell Diameter: 36 mm. Ocular Bell Diameter: 36mm. Adjustment Click Value: 1/4 . Eye Relief: 4.5 . Exit Pupil Diameter: 7 mm. Field of View at 100 Yards: 25.5 4x.