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