Coating Thickness Tester, Maximum Thickness Measured 49 mil, Minimum Thickness Measured 0 mil, Thickness Measurement Accuracy +/-3 Percent, Calibration Certificate Type Not Certified, Display Type Digital, Number of Records Stored 400, Testing Method Magnetic, Compatible Material Ferrous Metal, Nonferrous Metal, Thickness Measurement Resolution 0.004 mil; 0.1 micron m, Includes Calibration Aluminum, Calibration Iron, Precision Standards, Soft Carrying Case, USB Cable