Granite Straight Edge Long Form Calibration Certificate No Material Granite Application Grade Inspection Color Pink Flatness 0.000050 in per 6 in Grade A Height - Inch 6 in Height (mm) 150 Included Certification Short Form Certificate of Accuracy with NIST Traceability Length (In.) 36 in Length (mm) 900 Number of Finished Faces 1 Number of Pieces Single Block Parallelism 0.000050 in per 6 in Maximum of 0.0003 in Size (In.) 2 in x 6 in x 36 in Size (mm) 50 mm x 150 mm x 900 mm