Granite Parallel Long Form Calibration Certificate No Material Granite Application Grade Laboratory Color Pink Flatness 0.000025 in per 6 in Grade AA Height - Inch 1 in Height (mm) 25 Included Certification Short Form Certificate of Accuracy with NIST Traceability Length (In.) 6 in Length (mm) 150 Number of Finished Faces 4 Number of Pieces Matched Pair Parallelism 0.000025 in per 6 in Maximum of 0.000025 in Size (In.) 6 in x 1 in x 0.75 in Size (mm) 150 mm x 25 mm x 19 mm