Welcome to our store! This iris diaphragm provides small apertures of varying diameters within an optical system to meet diverse light transmission requirements. The compact and practical design ensures stable, lightweight, and easy operation. Crafted with high-quality precision, it boasts exceptional quality, longevity, high strength, and excellent durability. The inner hole's magnification and reduction range spans 1.5-34mm, catering to your needs and adapting to a wide array of optical instruments, cameras, and more. Constructed from aluminum alloy, it resists rust, offers excellent hardness, corrosion resistance, and low density for reliable and lasting performance. Item Type: Iris Diaphragm Material: Aluminum Alloy Color: As Shown in the Picture Model: SK34 Outer Diameter Size: Approx. 49mm / 1.93in Inner Hole Size: Approx. 1.5-34mm / 0.06-1.34in Thickness: Approx. 5.6mm / 0.22in Application: Optical instruments such as laser cameras Includes: 1 x Iris Diaphragm Your 100% satisfaction is our top priority. We are committed to providing you with the best service. If you encounter any issues upon receiving the product, such as damage or incorrect quantity, please contact us immediately, and we will provide you with the best solution!