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BK-FL Fluorescence LED HBO B,G,U,UV, Upright Biological Microscope Eyepiece WF10×/20mm (23.2) Infinity Plan Objectives PLAN 4×/0.10 W.D.=12.10mm PLAN 10×/0.25 W.D.=4.64mm PLAN 20×/0.40(S) W.D.=2.41mm ...