Nicety CM8801N Digital Coating Thickness Gauge Paint Meter Tester 0-1250um/0-50mils, Pocket Size, Grey/Green Paint Meter for Non Magnetic Metals like Aluminum, Copper Resolution: 1 micon / 0.1 mils Range: 0 - 1250 micon; 0 - 50 mils Does NOT work on iron and steel calibration shims, stable case and battery 1x AAA included