SK60 Aperture Diaphragm Manual Adjustable Microscope Lens Optical Diaphragm

--\n--\n\nFeature: \n 1. 4-60mm adjustable aperture to meet different light transmission requirements.\n2. Easy to install, adapt to a variety of optical instruments, cameras, etc.\n3. With 18 blades, it is easy to adjust and make the diaphragm work more stable.\n4. Selected high\u2011quality aluminum alloy materials, strong and durable to use.\n5. Exquisite processing and manufacturing, stable and reliable performance. \n\nSpecification: \n\nItem Type: Lens Diaphragm\nMaterial: Aluminum Alloy\nModel: SK60\nUses: Optical Instruments\nBasic Parameters:\nInner Hole Size: Approx. 4-60mm / 0.2-2.4in\nOuter Circle Size: Approx. 82mm / 3.2in\nThickness Size: Approx. 8mm / 0.3in\nNumber of Blades: 18\n\nPackage List: \n 1 x Lens Diaphragm \n\nNote: \n 1. Please allow 0\u20111 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one a-