Feature:1. HIGH LIGHT TRANSMITTANCE: High light transmittance, high refractive index, brighter and clearer imaging.2. ALL METAL MATERIALS: The mirror body is made of all metal materials, with fine workmanship and quality assurance.3. UNOBSCURED: The viewing is more comfortable, the lens will not be corroded or blurred, and the service life is long.4. STANDARD INTERFACE: Standard interface, interface diameter 23mm, can be used with microscopes of the same aperture.5. FEATURES AND USES: It has the characteristics of wide angle eyepiece, high eye point and large field of view, and is used for magnified observation of objects.Specification:Item Type: EyepieceMaterial: Aluminum Alloy + Optical GlassPurpose: Magnify And Observe ObjectsFeatures: Wide Angle Eyepiece, High Eye Point, Large Field Of View.Package List:1 x EyepieceNote:Please allow 01mm / 00.04in error due to manual measurement. Thanks for your understanding.