1Adjustable: Adjustable hole ID 2.536mm, OD 50mm, thickness 6mm, 14 blades, providing different diameters of small holes in the optical system to meet different needs for light transmission. 2Easy to Disassemble: Simple to use, easier to disassemble and install, can be easily combined with other optical instruments. 3Exquisite Appearance: Exquisite and smooth appearance, beautiful texture, so that you can enjoy visual enjoyment in the process of use. 4Applications: This adjustable iris aperture has high accuracy and can be more widely used in the optical field. 5Aluminum Alloy: Made of premium aluminum alloy material, no burrs and pressure points, not easy to be deformed, strong elasticity and stability. Item Type: Adjustable Iris Aperture Weight: Approx. 41g / 1.45oz Material: Aluminum Alloy Adjustable Hole Inner Diameter: Approx. 2.5-36mm / 0.10-1.42in Outer Diameter: Approx. 50mm / 2.0in 1 x Adjustable Diaphragm 1 x StorageBox