AmScope 4X Achromatic Microscope Objective

AmScope PA4X-INF 4X Infinity Plan Achromatic Microscope Objective #a1

AmScope 4X Plan Achromatic Compound Microscope Objective Lens

4X 10X 20X 40X 60X 100X Achromatic Objective Lens f/ Biological Microscope 185mm

AmScope 4X Plan Achromatic Objective Lens with Knurled Ring

AmScope PA4X-INF 4X Infinity Plan Achromatic Microscope Objective