This precisions measurement tool is essential for researcher, students, and laboratory professional requiring dependable calibration for their microscopes Ensures long lasting and clear by gently cleaning the surfaces with a cloth dampened Crafted from clear film for unobstructed viewing, this distortion resistant calibration ruler features a compact, credit card size for portability and use Utilize this objective micrometer in laboratory settings for accurate calibration across various microscope types, including video, biological, and stereo microscopes Achieve precise microscopic measurements with this 0.1mm objective micrometer, a microscope calibration ruler designed for high accuracy and accurate results, Manufacturer: Fcnjsao