Granite Parallel Long Form Calibration Certificate No Material Granite Application Grade Inspection Color Pink Flatness 0.000050 in per 6 in Grade A Height - Inch 3 in Height (mm) 75 Included Certification Short Form Certificate of Accuracy with NIST Traceability Length (In.) 18 in Length (mm) 450 Number of Finished Faces 4 Number of Pieces Matched Pair Parallelism 0.000050 in per 6 in Maximum of 0.00015 in With Inserted Metal Disc No With Lifting Holes No 1 Pair