Feature 1、Coated Lens: The lens is coated, has high light transmittance and high refractive index, making the image brighter and clearer. 2、Metal Body: The body is made of all metal material, with fine workmanship and quality assurance, which is sturdy and not easy to broke. 3、Comfortable Usage: The eyepiece has a wide field of view, making viewing more comfortable, the lens will not corrode, wear and tear, and have a long service life. 4、Standard and Universal: The diameter of the interface is 30mm, which is a standard size, and can be used for stereo microscopes has same diameter. 5、Application: This eyepiece as the important fitting of microscopes in laboratory, is mainly used on stereoscopic microscopes. Item Type: Microscope Eyepiece Product Model: WF20X/12 Multiplication: WF20X, adjustable visibility. View Field: Approx. 12mm / 0.47in Interface Size: Approx. 30mm / 1.18in, standard. Package List 1 x Microscope Eyepiece