SPI Interchangeable Rod Type Inside Micrometer, 2 – 8 – 12-371-1

SPI Interchangeable Rod Type Inside Micrometer, 2 - 8" - 12-371-1 Graduations: 0.001" Rod diameter: 0.248" Each rod is marked for range Overall accuracy: 0.0004" up to 12"size; 0.001" up to 40" size Certificate of calibration traceable to NIST Specificatio