Feature: 1. OBSERVING MATERIALS: Microscope objective lens can detect the structure and defects of materials, contributing to research in the field of materials science and engineering, observe the structure and composition of natural and man made fibers, steel, ceramics and other materials, which is helpful for quality inspection and improvement in manufacturing industry 2. SCIENTIFIC RESEARCH: Achromatic objective lens can be used to study and observe the crystal structure and morphology of materials and compounds, helping to study chemistry and physics; Also can be used to study the behavior and reaction of organisms in different environments, such as the movement of cells, the morphological changes of membranes and so on 3. WIDE APPLICATION: The screw interface size of the lens is the international standard RMS size, with a wide range of compatibility, most professional biological microscopes in the market can be used 4. CLEAR AND BRIGHT: The objective lens adopt high light transmittance coat with high refractive index, and the image is brighter 5. DURABLE MATERIAL: Achromatic microscope objective is made of brass and aluminum alloy, with fine workmanship, corrosion and fall prevention, exquisite and durable, shell adopt chromium plated accurate material Specification: Item Type: Microscope Objective Lens Material: Brass, stainless steel Application: Wide Range of Applications, international standard RMS size thread interface, most professional biological microscopes in the market can be used Specification: 4X. Package List: 1 x Lens1 x Storage Container