This is a brand new 5X Achromatic microscope objective lens with high quality. It is an International DIN/JIS lens. It fits common size (DIN/JIS standard) compound / biological microscopes. We also have 2X, 4X, 10X, 20X, 40X, 60X and 100X objectives available. Give your microscope a boost with greater power & clarity at a fraction of cost. Features & Specifications: 5X Magnification Power DIN Standard Achromatic Objective Lens 5/0.1; 160/0.17 20mm Mounting Thread (in diameter)