Feature: 1. Aluminum Alloy Material: The adjustable aperture iris diaphragm is made of aluminum alloy material, without burrs and pressure points. The adjustable aperture iris diaphragm does not deform, is durable, has a long service life, and can be used repeatedly for a long time, bringing you a good user experience. 2. Adjustable Aperture: The aperture diameter can be changed through the handle. The 2‑50mm adjustable aperture can meet different light transmission requirements. 11 blades are easy to adjust, making the aperture work more stable. 3. Practical and Stable: The adjustable iris aperture diaphragm is an esessential accessory for lasers, cameras, and optical platforms, very practical. Make the aperture work more stable and convenient, with stable and reliable performance. 4. Easy Installation: The manual adjustable aperture is easy to use, making disassembly and assembly more convenient, and eliminating the tedious installation steps. Suitable for various optical instruments, cameras, etc. 5. Durable: The adjustable aluminum alloy iris aperture diaphragm is exquisite, smooth, abrasion resistant and durable. Specification: Item Type: Iris Diaphragm Material: Aluminum Alloy Weight: Approx. 81g / 2.9oz Hole Diameter: Approx. 2-50mm / 0.0/-1.97in. Package List: 1 x Iris Diaphragm1 x Packing Box