Product Description: Magnification: 2XField of View: 15mm; Mounting Size (in diameter): 23.2mmMicroscope: Biological MicroscopeInsert the lens barrel depth: 29mmCan be inserted into the eyepiece depth: 22mmNote:23.2mm universal standard interfaceHuygens eyepiece and wide-angle eyepiece are both 23.2mm interface size, the international standard biological microscope interface size is 0.91 inches, converted to millimeters is 23.2mm. 95% of biological microscopes on the market can be used universallyWarm TipsThe eyepiece diameter is 23.2mm universal interface, the data is the measurement standard of biological microscopes, except for stereo microscopesBiological microscope eyepiece interface 23.2mm diameter Stereo microscope eyepiece interface 30mm diameterDifferent batches, different shooting angles and lighting, there are slight differences between the actual product and the picture, which will not affect normal useMaterial: Metalcolour: blackPackage Contents:1 x Microscope 2X Barlow LensOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.