Features Seiko Manufacturing Miniature High Definition Telescope. Ratio 8 Times. Caliber 20Mm. Object Diameter 20Mm Field Angle n5 Degrees Kilometer Horizon 96M/1000M Exit Pupil Diameter n5Mm Exit Pupil Distance n3Mm Last Focusing Distance 5M Dimensions Length 75X Diameter 24Mm Thickness 36Mm Prism System Paul Prism System. Lens An Optical Lens. Optical Coating Fmc Full Wideband Green Film. Eye Mask Type Cover The Eye Mask, Suitable For Myopia And Non - Myopia. Function Nitrogen Filling WaterproofA Included 1 X 8X20 Monocular Telescope 1 X Cleaning Cloth 1 X Sling+ Storage Package 1 Xpacking Box The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom’s policies and EU/AU/NZ/US Product Safety and Compliance laws.