Feature: 1. High eye point, wide angle, large field of view, comfortable observation 2. All-optical glass lens, clear and bright vision 3. anti-reflection coating, high refractive index, high light transmittance Specifications: Magnification: 20X Interface diameter: 30mm Field of view diameter: 12mm Application: Stereo microscope eyepiece Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: Black Material: plastic Package Contents: 2pcs eyepiece Only 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.