1、Material: Made of pure copper, chrome plated on the surface, metal material, feel comfortable. 2、Universal Lens: Universal 20.2mm standard RMS interface thread, have broad compatibility. 3、Low Power Lens: The low power lens has a larger aperture, and the imaging is brighter and the field of view is larger. 4、Infinity Lens: The infinity lens forms a clearer and sharper image, and the field of view is wider than ordinary achromatic objectives. 5、Infinity Lens: The infinity objective lens is parallel light path, no included angle, spherical aberration and sink aberration are corrected. 1 x Microscope Objective Lens1 x Storage Box (Installed)1 x Protective Cover (Installed) Item Type: Microscope Objective LensMaterial: Copper + Optical GlassColor: As Pictures ShownWeight: Approx. 58g/ 2.0ozMultiple: 1XNumerical Aperture: Approx. 0.03mm/ 0.001inApplicable Models: Biological Microscope