Item Type: Iris Diaphragm Material: Aluminum alloy Weight: Approx. 8g/0.3oz Hole Inner Diameter: Approx. 1 to 16mm/0.03 to 0.63in Blade: 10 pieces Package List 1 x Iris Diaphragm 1Adjustable Aperture: Change the aperture diameter with the handle. The adjustable aperture ranging from 1 to 16mm meets various light transmission requirements. The 10 blade design allows for easy adjustment, ensuring stable aperture operation. 2Aluminum Alloy Material: The adjustable aperture diaphragm is made of premium aluminum alloy, ensuring reliability, durability, and a long lifespan. It can be used repeatedly for an extended period, providing you with a satisfying user experience. 3Practical and Stable: The compact and practical design, along with exquisite manufacturing processes, ensures stable and convenient aperture operation. The adjustable aperture diaphragm performs reliably and consistently. 4Easy Installation: The manual adjustable aperture is easy to use and convenient to disassemble and install. It eliminates the need for complicated installation procedures. 5Wide Applications: This adjustable iris aperture diaphragm is suitable for cameras, microscopes, and other optical devices, helping them perform optimally.