1、Adjustable Design: This product can be installed with threads M30 to M37, adjustable aperture 5 to 26mm/0.06 to 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. 1 x Iris Diaphragm Item Type: Iris diaphragmWeight: 32.00g/ 1.13ozMaterial: Aluminum alloyAperture Diameter: 1.5mm to 26mm/ 0.06 to 1.02inApplication: Lens modification, etc