... Warranty period: 3 years SV-T101 High-precision ultrasonic thickness gauge Handy, precise, available for testing cast-ironInstrument features:Achieving precise ... to measure the thickness of good conductor for ultrasonic, such as metal (steel, cast iron, aluminum, copper), plastic, ceramic, glass, glass ... reports and so on. SV-T101 High-precision Ultrasonic Thickness Gauge