Item Type: 1.822mm Adjustable Iris Aperture Weight: 13g/0.46oz Material: Aluminum alloy Hole Diameter: 1.8-22mm Blade: 11 pieces Package List 1 x Adjustable Iris Aperture 1Aperture Adjustable: Aperture diameter can be changed by handle. The 1.822mm adjustable aperture can meet different light transmission requirements. The 11 blades are easy to adjust, making the aperture work more stable. 2Can be Used Repeatedly for a Long Time: Manual diaphragm is durable, does not fade, has a long service life, and can be used repeatedly for a long time. 3Simple Installation: Manual adjustable aperture is easy to use, more convenient disassembly, eliminating cumbersome installation steps. 4Stability: Aluminum alloy material, no burrs, comfortable to use, iris lens does not deform, strong elasticity, nice stability, improve your experience. 5Durable Material: The adjustable aperture diaphragm is made of aluminum alloy material, reliable and durable, long service life, and can be used repeatedly for a long time. 6Wide Range of Applications: This adjustable aperture is suitable for cameras, microscopes and other machines, which can help them work better.