The magnification is WF10X, providing a bright and clear image with enhanced clarity. Built-in reticle with scales for easy angle adjustment and position calibration of the measurement object, facilitating observation. Standard 23.2 mm installation size, compatible with most biological microscopes on the market. Constructed from high-quality optical components and metal for durability and long-term use. WF (Wide Field) design offers a wider field of view, suitable for various microscopes, optical instruments, and metal mirror bodies, enhancing both magnification and viewing area. Ergonomic design helps reduce eye strain during extended use, supporting visual comfort. Color: Black Material: Metal Size: 18mm Package Contents: 1 x Eyepiece Note: Other items not included. Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance: +/- 1-3 cm.