Magnification: 4-16 Objective Lens: 50MM Coating: FMC Green Feild Of View: 10° ~ 4.5° Resolution: 15 Finish: Black matte Waterproof: Yes Nitrogen: Full filled Nitrogen Tube diameter: 25.4mm Length: 38.9cm Click Value: 0.25 PARALLAX: + 0.22 SD~ -0.22 SD Reticle: Glass-etched Wide-angle and Dual Illuminated Rings