Adjustable Aperture: The aperture diameter can be changed with the handle. The 1.8-22mm adjustable aperture can meet different light transmission requirements. The 11 blades are easy to adjust, making the aperture work more stably. Reusable for a Long Time: The manual aperture is durable, does not fade, has a long service life, and can be used repeatedly for a long time. Easy Installation: The manual adjustable aperture is easy to use, more convenient to disassemble, eliminating cumbersome installation steps. Stability: Aluminum alloy material, no burrs, comfortable to use, the iris lens does not deform, strong elasticity, fine stability, improves your experience. Durable 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. Wide Range of Applications: This adjustable aperture is suitable for cameras, microscopes, and other machines, which can help them function better.