* Plug Type.
* Three pairs of ratio arms are each 10, 100, 1000 ohms.
* Resistance arms contains 16 coils from 1 to 5000 ohms with infinity plug.
* Two spring keys having contact for battery and galvanometer fitted.
Medical Microscope : Export Quality Heavy Body 40 Years of Expertise in this field. Genuine Quality Products. Specification: Metal Construction Eyepiece: 10x, 15x Objective: 10x, 45x, 100x Total Magnification: 100x to 1500x Separate Coarse Fine Focusing Knobs Plano concave mirror on gimble mount for illumination Fixed abbe type condenser with iris diaphragm Mechanical stage for X-Y Movement Gives Clear Images Easy To Operate Ideal for School & Kids Color Available: BLACK Or SILVER (whichever available) 2 prepared slides, 10 plain slides includes. BOX CONTENTS: Microscope, 2 Eyepiece, 3 Objective, Dust cover, cleaning cloth, 2 prepared slides, 10 plain slides, immersion oil