Sightron SI Riflescope 3-9x40 Plex, Stainless Steel #SI3-9x40ST Multi-coated objective and ocular lenses for superior performance. Finger adjustable windage and elevation knobs gives you precise click adjustments found in scopes costing much more. It is waterproof, shockproof and nitrogen charged. Specifications: -Finish: Stainless -Field of View @100 Yards: 38-13ft -Tube Diameter: 1" -Weight: 13.4 oz. -Length: 12.75" -Click Value: 1/4 MOA -Eye Relief: 4.5-3.6" -Reticle Type: Plex Shipping Weight: 2 lbs.