Features Easy to Install: The microscope objective is compact in size, easy to stick on the objective, just screw on, easy to use Function: This professional auxiliary object lens works to assist for stereo zoom microscopes Scope of Application: 0.7X lens is suitable for SM series stereo micromirrors, extending the working distance and live view of the microscope Premium Metal Material: The auxiliary objective lens is made of excellent quality aluminum alloy material, light weight, possess good strength and good corrosion resistance Reliable Performance: Auxiliary objective lens come with stable structure, excellent performance and long service life Specification: Item Type: Auxiliary Objective Lens Model: WD120 Material: Aluminum alloy Use: Microscope accessories Basic Parameters:  Magnification: 0.7X Lens Diameter: Approx. 48mm / 1.89in Package List: 1 x Auxiliary Objective Lens Package List 1 x Auxiliary Objective Lens