Feature: 1. Clear Imaging: Wide angle eyepiece, high transmittance, high refractive index, large Angle of view, wide field of vision, make the image more clear and bright. 2. Aluminum Alloy Material: The body of the mirror is made of aluminum alloy material, fine workmanship, wear resistance and light, durable. 3. Long Service Life: This eyepiece has a wide field of vision, which makes it more comfortable to watch. The lens will not corrode or become frayed, so it has a long service life. 4. Easy Installation: The eyepiece has a standard interface, the interface diameter is 30mm, suitable for a variety of types of microscope can be used. 5. Ideal Replacement: This eyepiece provides excellent imaging results and is ideal as a replacement eyepiece for your microscope to improve the performance of your microscope. Specification: Item Type: Adjustable Large Field Eyepiece Material: Aluminum alloy Product Model: SWHN10X H 23 Features: 30mm standard aperture, suitable for many models of microscopes Magnification: 10X Diopter: -8-+2 Field of View: Approx. 23mm / 0.91in Diameter: Approx. 23.5mm / 0.93in Height: Approx. 53mm / 2.09in Mounting Aperture: Approx. 30mm / 1.18in . Package List: 1 x Adjustable Large Field Eyepiece