This Model is mounted on a heavy metal base. It is most suitable for Educational Institution. Various Components are made from high precision machines, mounted on the  aluminum plate form and the complete interferometer is mounted on a heavy metal base. It consists of beam splitter and compensator Plates mounted in an aluminum housing. It is fitted on the aluminum base at 45 to two reflecting mirrors. All flat optics used have flatness of at least l/4 and are protected with a layer of silicon Monoxide coating.  Least Count 0.01mm. It also consist of reading telescope of magnification 3x, fitted with Ramsden eyepiece & cross line graticule. 20x objective with mount is also supplied with interferometer