Feature:1. Objective Lens Material: Pure copper material, chrome plated surface, metal material, feel comfortable.2. Thread Interface: General 20.2mm/0.8in standard RMS interface thread, 195 achromatic low power objective lens.3. Clear Imaging: Provide high quality observation without additional chromatic aberration, making the image clearer.4. Bright Field of View: 2x objective lens has a larger light aperture, and the imaging is brighter and the field of view is larger.5. Parameters: Aperture value: 0.05mm, the tube length of the microscope is 160mm/6.3in when in use, suitable for biological microscopes.Specification:Item Type: Microscope Objective LensColor: As Picture ShownMultiple: 2xWeight: Approx.58g/2.0ozMaterial: Copper + Optical GlassAperture Value: 0.05mmTube Length: Approx. 160mm/6.3inApplicable Models: Biological Microscope.Package List:1 x Objective Lens 1 x Storage Box (Installed)1 x Protective Cover (Installed)