Coating Thickness Tester Ferrous and Non-ferrous Base Material Ferrous and Non-Ferrous Metals Measuring Range 0 to 80 mil Accuracy +/-3 Percent (7.9 to 39 mil) +/-4(0 to 7.8 mil) +/-5 Percent (39.1 to 80 mil) Data Storage Yes Recording Capacity 250 AAA Battery Type Includes Batteries Calibration Standards Case Instructions Wrist Strap Manufacturers Warranty Length 1 yr