Feature:1. Adjustable Design: This product can be installed with threads M30 to M37, adjustable aperture 1.5 to 26mm/0.06 to 1.02in, and provides small holes of different diameters in optical systems to meet different light requirements.2. Highly Stable: The diaphragm is lightweight and does not add extra weight to the optical system. It has high strength, rust prevention and stable performance.3. Easy to Operate: This product is easy and fast to operate, and users only need to rotate the outer ring to change the aperture diameter.4. Aluminum Alloy Material: This product is made of aluminum alloy material and adopts a compact and practical design, making it durable and not easily damaged, and can be used by users for a long time;5. Widely Used: This adjustable aperture is suitable for cameras, microscopes, and other machines, which can help them work better.Specification:Item Type: Iris diaphragmWeight: 32.00g/1.13ozMaterial: Aluminum alloyAperture Diameter: 1.5mm to 26mm/0.06 to 1.02inApplication: Lens modification, etc.Package List:1 x Iris Diaphragm