Microscope Adjustable Aperture, SK6 SK8 SK12 SK23 SK25 Microscope Iris Adapter, Optical Diaphragm for Microscope(SK12) auspowers_batchone Internally threaded: 7/16" -20

Internally threaded: 7/16" -20

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you can substitute other suitable screws by yourself if you think you need it

friends and loved ones using these cute stickers

Microscope Adjustable Aperture, SK6 SK8 SK12 SK23 SK25 Microscope Iris Adapter, Optical Diaphragm for Microscope(SK12) auspowers_batchone Internally threaded: 7/16" -20Microscope Adjustable Aperture, SK6 SK8 SK12 SK23 SK25 Microscope Iris Adapter, Optical Diaphragm for Microscope(SK12) Specification: Item Type: Iris DiaphragmSK6Outer Diameter: 13. 0mmMinimum Aperture: 0. 8mmMaximum Aperture: 6mmMaterial: MetalThickness: 6mm8 BladesPackage List: 1 x Diaphragm Product Features APPLICATION: Small apertures of different diameters are provided in the optical system to meet different light transmission requirements.