Leapers Style 3-9X50 Rifle Scope AO Mil-dot Three Colors Reticle Rifle Scope for Hunting Magnification : 3-9X Objective Lens Diameter : 1.97" (50mm) With the fully coated optical glass, the rifle scope would give you a bright and high-contrast image. Red/Green/Blue,levels of brightness Material:Aluminum Alloy;size:242mm*70mm*70.5mm Inert gas purged, fog,shock, water proof, this scope can be used under any weather condition.