AmScope Plan Objective Lens Set These brand new microscope Plan Achromatic objective set comes with 4X, 10X, 40X &100X Plan Achromatic objectives, fitting common size (DIN standard) compound microscopes Plan Achromatic Objective 4X (4/0.1, 160/0.17) Plan Achromatic Objective 10X (10/0.25, 160/0.17) Plan Achromatic Objective 40X (40/0.65 (Spring), 160/0.17) Plan Achromatic Objective 100X (100/1.25 (Spring, Oil), 160/0.17)