Infinite plan Achromatic Objective Lens for Olympus Biological Microscope. Magnification: 4X, 10X, 20X, 40X, 60X, 100X.Spring loaded 20x and 40x and 100x for protecting slides and lens. Connecting thread: international standard interface "4/5 inches 1/36 inches" in diameter approximately 20.30.705mm. For Olympus CX21 CX31 CX41 series. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical/Lab Equipment Attachments & Accessories\Microscope Parts & Accessories\Microscope Objectives". The seller is "goodeals-1" and is located in this country: CN. This item can be shipped worldwide.