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