Feature<br> 1、Small apertures of different diameters are provided in the optical system to meet different light transmission requirements. 2、Change the diameter of the aperture by the handle. 3、Metal material, reliable performance, durable. 4、We provides 5 kinds of aperture for you to choose from to meet different requirements. 5、Compact and practical design make the diaphragm works more stable.<br> Item Type:Iris Diaphragm<br> SK25:<br> Magnified Diameter: 1.5-25mm<br> Material: Metal<br> Outer Diameter :44mm<br> Inner Diameter: 25mm<br> Thickness :8mm<br> 14 blades<br> SK23<br> Outer Diameter: 37mm<br> Minimum Aperture Diameter: ø1.5mm<br> Maximum Aperture Diameter: ø23mm<br> Material:Metal<br> Thickness: 7.0mm<br> 12 Blades<br> SK12<br> Outer Diameter: 19.8mm<br> Minimum Aperture: ø1mm<br> Maximum Aperture: ø12mm<br> Material: Metal<br> Thickness: 5.0mm<br> 10 Blades<br> SK8<br> Outer Diameter: 14.8mm<br> Minimum Aperture: ø0.8mm<br> Maximum Aperture: ø8mm<br> Material: Metal<br> Thickness: 4.5mm<br> 8 Blades<br> SK6<br> Outer Diameter: 13.0mm<br> Minimum Aperture: ø0.8mm<br> Maximum Aperture: ø6mm<br> Material: Metal<br> Thickness: 6mm<br> 8 Blades<br> <br> Package List<br> 1 x Diaphragm<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store