Features: Achieve precise microscopic measurements with this 0.1mm objective micrometer, a microscope calibration ruler designed for high accuracy and accurate results. Crafted from clear film for unobstructed viewing, this distortion resistant calibration ruler features a compact, credit card size for convenient portability and use. This precisions measurement tool is essential for researcher, students, and laboratory professional requiring dependable calibration for their microscopes. Utilize this objective micrometer in laboratory settings for accurate calibration across various microscope types, including video, biological, and stereo microscopes. Ensures long lasting performances and clear by gently cleaning the surfaces with a cloth dampened. Specifications: Component:ABS Size:Approx.45mm/1.77''x75mm/2.95'' Package Includes: 1/2/5Pcs Microscope Micrometer note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.