Features 1、High quality craftsmanship, its appearance is exquisite and smooth, which can bring you a great visual and tactile enjoyment. 2、Detachable design, it is more convenient to install, can create more possibilities, and can be more easily combined with other equipment. 3、Using high quality aluminum alloy material, it is anti corrosive, durable and color fast, can be used in various situations, and has a long service life. 4、Good performance, high accuracy, can meet the high standards of the industry, and is more widely used in the optical field. It is a good helper for you to control light. 5、Compact structure, its body has no burrs and pressure points, is not easy to deform, and has strong flexibility, stability and practicality. Specification Item Type: Diaphragm Model: SK15 Material: Aluminum Alloy Uses: It can be used as accessories for lasers, cameras, and optical platforms. Outer Circle Size: Approx.28mm / 1.1in Inner Hole Size: 1.5-15mm / 0.1-0.6in (Adjustable) Thickness: Approx.9mm / 0.4in Number of Blades: 12 Package List 1 x Diaphragm