1. CHEMICAL PHYSICAL CELL RESEARCH: Objective on the microscope can be used to study and observe the crystal structure and morphology of materials and compounds, which helps to study chemistry and physics It can be used to study the behavior of organisms in different environments, such as cell movement and membrane morphological changes. 2. MATERIAL RESEARCH: Objective on the microscope can detect the structure and defects of materials, which is helpful for research in the fields of materials science and engineering Observing the structure and composition of natural and artificial fibers, steel, ceramics, and other substances is helpful for quality inspection and improvement in the manufacturing industry. 3. RMS SIZE: The thread interface size is an international standard RMS size, and most professional biological microscopes on the market can be used. 4. BRASS, ALUMINUM ALLOY MATERIAL: Made of premium brass and aluminum alloy material, this objective is corrosion and drop resistant, ensures a long life span. 5. 100X: This is a 100X microscope objective, check for better using experience! An ideal replacement for the damaged parts. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store