COAXIAL METALLURGICAL MICROSCOPE : Co-Axial Binocular or Trinocular Metallurgical Microscope (CMM-11) : Coaxial coarse and fine focusing system travel on ball guides for smooth and long life movement is fitted with Binocular head assembled from hard coated prism, Bright field horizontal 6v/20W illuminator is equipped with iris diaphragm and slot for dropping filter, Quadruple revolving BALL BEARING assembled nose piece, Graduated Low Drive co-axial mechanical stage, having built in base variable light control transformer, supplied with two colored filters, Dust cover and following optics in box.