?????? ?????? ?????Iris Diaphragm, 13/14.8/19.8/37/37mm Practical Adjustable Microscope Iris Adapter Aperture Lens Optical Diaphragm Replacement for Microscope(SK23)

Feature: 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. Specification: Item Type:Iris Diaphragm SK23: Outer Diameter: 37mm Minimum Aperture Diameter: ø1.5mm Maximum Aperture Diameter: ø23mm Material:Metal Thickness: 7.0mm 12 Blades Package List: 1 x Diaphragm