This is a brand new 4X 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 Plan 10X, 40X and 100X objective lenses available. Give your microscope a boost with greater power & clarity at a fraction of cost. Your satisfaction is guaranteed or your money back. Features & Specifications: Plan Achromatic Objective 4X Magnification Power 4/0.1 160/0.17