Features ALUMINIUM ALLOY: The aluminum alloy shell is resistant to wear and fall, which can provide perfect protection for the center lens. PERFECT REPLACEMENT: Our lenses are exquisitely crafted to fit your microscope perfectly and are a great option to replace broken or old lenses. MAIN APPLICATION: This lens is suitable for SM series stereo micromirrors, extending working distance and live microscope display. EASY TO INSTALL: The microscope lens is precise size and easy to install on the microscope, you just need to screw it and use it, which is very convenient. DOUBLE MAGNIFICATION: The lens magnification of this auxiliary lens is 0.5X, which doubles the magnification of the object you need to observe. Specification: Item Type: Auxiliary Lens Material: Aluminum Alloy Model No.: WD165 Use: Microscope Accessories Magnification: 0.5X Package List: 1 x Auxiliary Lens Package List 1 x Auxiliary Objective Lens