Features It is used in the lens cone with the diameter of 23.2 mm. The image is bright and clear, and the effect is clearer The wide-angle eyepiece has a 50% larger field of view than normal eyepiece The eye is not easy to get tired when watching, protect your vision Fits most common size compound biological microscopes Specification: Model:DM-WF001 Magnification power: 10X Connector Diameter: Size: 23 cm/9.1 inches Weight: about 50g/1.8oz Features: It is used in the lens cone with a diameter of 23.2 mm. The wide-angle eyepiece has a 50% larger field of view than the normal eyepiece The image is bright and clear and the effect is clearer The eye is not easy to get tired when observing, protect the eyesight It adapts to the most common size compound biological microscopes Package List: 1 eyepiece Package List