Feature:1. Aluminum Alloy Material: The lens diaphragm is made of premium aluminum alloy material, providing durability and a long lifespan. It can be used repeatedly for a long time, delivering a great user experience.2. Adjustable Diaphragm: The microscope diaphragm adapter can change the diameter of the diaphragm through a handle. The adjustable diaphragm ranging from 3mm to 52mm meets different transparency requirements. With 14 blades for easy adjustment, ensuring stable diaphragm operation.3. Practical and Stable: The camera diaphragm features a compact and practical design, with exquisite manufacturing craftsmanship, ensuring convenient and stable diaphragm operation with reliable performance.4. Versatile Application: The lens diaphragm is versatile and compatible with various optical instruments and cameras, enhancing their performance and functionality.5. Easy Installation: The manually adjustable lens optical diaphragm is easy to use and hassle free to install, saving you from complicated installation steps.Specification:Item Type: Lens DiaphragmMaterial: Aluminum alloyWeight: Approx. 66g/2.3ozHole Inner Diameter: Approx. 3 to 52mm/0.1 to 2.0in.Package List:1 x Lens Diaphragm1 x Storage Box