Nikon Microscope Objective CFI E Plan 10x. There is no "MADE IN CHINA" marking, but it is likely detached. Educational CFI Plan Achromat Lens. 60 mm, same focal length. No specified cover glass thickness. Working distance: 7.0 mm. Compatible with Nikon Eclipse E400, E600, 50i, 80i, Ci, Ni, etc. Though the field of view will be slightly narrower. International Buyers - Please Note.