①. The magnification is WF10X, the image is bright and clear, and the effect is clearer. ②. Built-in reticle with scales for easy adjustment of the angle, calibration of the position of the measurement object, easy to observe. ③. The national standard installation size is 23.2 mm, which is suitable for most biological microscopes on the market. Made of optics and metal, it is durable and practical. ④. (Wide field) wide-angle field of view is suitable for many microscopes, optical components, and metal mirror bodies, which not only enriches the magnification of the microscope, but also has a wider field of view. ⑤. When using this product, the eyes are not easily fatigued, which can effectively protect eyesight. ⑥. colour: black ⑦. Material: Metal ⑧. Size: 18mm ⑨. Package Contents: 2 x Microscope Eyepiece. Only the above package content, other products are not included. ⑩. Note: Light 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.