Monocular-Microscope-Prime-LED-101-4X-10X-40X-Objectives-Eisco-BI0009B-p-EISCO-BI0009B-Monocular-Microscope-Prime-LED-101-4X-10X-40X-Objectives-This-monocular-compound-microscope-is-an-excellent-choice-for-home-educational-use-&-is-designed-for-primary-to-high-school-grade-levels-With-an-adjustable-LED-illumination-system-the-coaxial-focusing-mechanism-allows-for-simple-fine-&-coarse-adjustment-It-has-a-rotating-disc-type-diaphragm-with-five-sizes-for-adjusting-light-transmi