CVLIFE Tactical 1-4x24mm Optics Hunting Rifle Scope Red &Green & Blue Tri-illuminated First Focal Plane Scope with 20mm Free Mounts Magnification: 1-4x;Objective Diameter: 0.94" (24mm); Eye Relief: 4.2" (106.68mm);Length: 10.48"(250mm);Tube Diameter: 1.18"(30mm) Lockable & Resettable Turrets with 1/4 MOA Per Click Adjustment With the multi coated optical glass, the rifle scope would give you a bright and high-contrast image. Made of high-strength aluminum alloy and with its one-piece tube construction, the scope is definitely for greater strength and durability. Inert gas purged: fog, shock, water proof; Reticle : first focal plane reticle with 3 levels of brightness intensity; Tri-illuminated: red, green and blue ( for better reticle visibility at night or in low light environments)