This is a brand new 10X Plan 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 4X, 40X and 100X Plan Achromatic objective lenses available. Give your microscope a boost with greater power & clarity at a fraction of cost. Features & Specifications: Plan Achromatic Objective 10X Magnification Power 10/0.25 160/0.17