Feature 1Reliable Work: The coated lens has high transmittance and high refractive index, so the image is brighter and clearer. 2Better Images: Enables 10X magnification, the achromatic lens has great achromatization effect for easy and clear view. 3Smart Designs: Has 20.2mm international standard RMS threaded interface, so microscope with the same size can use it. 4Fine Crafting: Using copper material with chrome plated shell, has excellent durability with corrosion and falling. 5Easy to Install: Comes with a compact size and a light weight, the convenient installation can be quickly completed.Item Type: Microscope LensModel: 10/0.25Material: CopperFunction: Microscope AccessoryInterface Size: Approx. 20.2mm / 0.8in (international standard RMS size)Magnification: 10XNumerical Aperture: 0.25mmApplicable Cover Glass Thickness: 0.17mmMicroscope Applicable Mechanical Tube Length: Approx. 160mm / 6.3inWorking Distance: Approx. 0.13mmCommon Rail Distance: Approx. 195mm / 7.68inParfocal Distance: Approx. 45mm / 1.77in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Microscope Lens1 x Storage Box