Feature:1. Long service life, not easy to rust, good hardness, high strength, corrosion resistance, low density and easy operation.2. It is manufactured with accurate craftsmanship, and high quality aluminum alloy material ensures its reliability and durability.3. The adjustable diaphragm is highly adaptable and can be adapted to a variety of optical instruments, cameras, etc.4. Small holes of different diameters can be provided in the optical system to meet different light transmission requirements.5. Small size, light weight, compact structure, convenient and practical, make the diaphragm work more stable.Specification:Item Type: Iris ApertureModel: SK17Material: Aluminum AlloyUses: optical instruments such as laser camerasOuter Circle Size: Approx. 32.5mm / 1.3inInner Hole Size: Approx. 17mm / 0.7inThickness: Approx. 6mm / 0.2inNumber of Blade: 7.Package List:1 x Iris ApertureNote:Please pay attention to the incisive edges of the blades, pay attention to safety when using, and do not put your hands on the blades.