Convenient handle-operated mechanism allows for easy adjustment of the aperture diameter, providing flexibility and control over the amount of light entering the system. Constructed from high-quality metal for superior durability and reliability, ensuring long-lasting performance and resistance to wear and tear. A wide range of different apertures are available, allowing the user to customize and fine-tune the optical system to meet specific requirements and preferences. Compact and practical design enhances stability and precision in diaphragm operation, making it ideal for professional use in microscopes and other optical devices. Versatile and adjustable aperture system with small apertures of various diameters to cater to diverse light transmission needs, ensuring optimal performance in different settings. Convenient handle-operated mechanism allows for easy adjustment of the aperture diameter, providing flexibility and control over the amount of light entering the system. Constructed from high-quality metal for superior durability and reliability, ensuring long-lasting performance and resistance to wear and tear. Offers a selection of 5 different apertures to choose from, allowing users to customize and fine-tune their optical system to meet specific requirements and preferences. Compact and practical design enhances stability and precision in diaphragm operation, making it ideal for professional use in microscopes and other optical devices. Versatile and adjustable aperture system with small apertures of various diameters to cater to diverse light transmission needs, ensuring optimal performance in different settings.