Granite Straight Edge Long Form Calibration Certificate No Material Granite Application Grade Laboratory Color Pink Flatness 0.000025 in per 6 in Grade AA Height - Inch 8 in Height (mm) 200 Included Certification Short Form Certificate of Accuracy with NIST Traceability Length (In.) 48 in Length (mm) 1 200 Number of Finished Faces 1 Number of Pieces Single Block Parallelism 0.000025 in per 6 in Maximum of 0.0002 in Size (In.) 3 in x 8 in x 48 in