It features a 54-76mm interpupillary adjustment, while both ocular tubes are equipped with a (+/-6) diopter adjustable, to compensate for eye-strength difference when needed The solid-steel, table-top, rectangular base provides a solid foundation to fit your observational needs Product Description; VS-5EZ-IFR07 This Vision Scientific binocular zoom stereo microscope is ideal for laboratory and industrial applications. Pair of 10x WF eyepieces Large-and-stable double arm boom stand offers a long and flexible working distance, while the advanced ball-bearing technology allows the arm to glide with little resistance. Perfect Match: The fuel valve switch is perfectly replacement for Robin EY15/EY20. Premium Metal: Made of the best high‑quality metal material, it is high temperature resistant, corrosion resistant and practical 45° inclined binocular head that rotates 360°. Light Source 144-LED ring light with intensity control, clear-and-crisp, cool-to-touch white light that lasts up to 60x longer than traditional tungsten bulbs Binocular zoom stereo microscope head Microscope Arm PA-2AE-IFR07 Binocular Zoom Stereo Microscope - 0.7X-4.5X Zoom Range Binoculares Profesionales Precise, heavy-duty rack and pinion focusing mechanism, with large knobs and adjustable tension control. Double arm boom stand Focusing arm Pair of eye guards One dust cover 0.5x and 2x auxiliary lens PA-5EZ Binocular Zoom Stereo Microscope - 0.7X - 4.5X Zoom Range, 0.5X... 144-LED ring light with intensity control Power adaptor 26” x 22” x 14” 50 lbs Double Arm Stand Large-and-stable double arm boom stand offers a long and flexible working distance, while the advanced ball-bearing technology allows the arm to glide with little resistance. Stand: Double arm ball-bearing boom stand 7X-45X Stereo Binocular Microscope with 14" Pillar Stand Magnification Range: 7x—45x, 3.5x—90x with the 0.5x & 2x auxiliary Lens Eyepiece: 10x WF / 20mm high eye point Zoom Range: 0.7x—4.5x, 1:6.4 zoom ratio We truly believe here at Vision Scientific, that our company and our products are unique from any other merchandising providers. Our technicians have years of first-hand experience and have extensive knowledge on the equipment we sell. They ensure that the mechanical movement, electrical safety and optical alignment are in perfect order, with no dust in the optical system. Light Source: 144-LED ring light with intensity control 144-LED ring light with intensity control, guarantees a clear-and-crisp, cool-to-touch white light that lasts up to 60x longer than traditional tungsten bulbs About Vision Scientific: Vision Scientific is a leading supplier of scientific products throughout North America. Our superior quality is supported by their experience and our inventory of microscope parts on-hand. Owned and operated by veterans in the scientific equipment industry, it has served the educational, medical and industrial sectors for over 30 years. Vision Scientific keeps an open line of communication for everyone. Head: Binocular, 45° inclined, rotates 360°