Straight Edge Flatness Tolerance 0.007 mm 0.07 mm Calibration Certificate Not Certified Straightness Tolerance Not Applicable Parallelism Tolerance Not Applicable Thickness 0.37 in Coating Not Applicable Flexibility Rigid Edge Style Beveled Color Silver Backing Material Not Applicable Finish Not Applicable System of Measurement Metric/SAE Includes Case Length - SAE 36 in Length - Metric 914 mm Width - SAE 2 9/16 in Width - Metric 64 mm Magnetic Nonmagnetic Material Steel