This is a new SPI 10-inch flat end micrometer calibration standard, designed for precise dimensional verification. It serves as a reliable reference tool for checking the accuracy of outside micrometers, ensuring they meet required measurement tolerances. This standard is suitable for machinists, quality control inspectors, and metrology professionals who require dependable calibration artifacts. The flat end configuration is common for general-purpose micrometer checking. Free shipping is available for this item. As a precision instrument, it is a practical purchase for workshops, labs, or anyone maintaining their measurement equipment. Please check the listing for full details on specifications and certification. SPI 10" Flat End Micrometer Calibration Standard. Condition: New. Listed at 47.58 USD. SPI 10 Inch Long, Accuracy Up to 0.0002 Inch, Flat End Micrometer Calibration Standard Use with Micrometers, Includes Heat Insulating Handle