Ultrasonic Thickness Gauge, Includes Carrying Case, Probe, Ultrasonic Couplant Gel, Ultrasonic Thickness Gauge, Thickness Measurement Accuracy +/-0.5 Percent, Thickness Measurement Resolution 0.001 in, Calibration Certificate Type Available Separately, Maximum Frequency 5 MHz, Maximum Thickness Measured 7.9 in, Minimum Thickness Measured 0.05 in, Maximum Velocity 9,000 mps, Minimum Velocity 500 mps, Number of Digits 4, Minimum Frequency 5 MHz, Number of Records Stored 0, Standards CE