LK300 Ultrasonic Thickness Gauge 1,Measurement Range: (0.75 ~ 300) mm (steel) 2, ... Gauge1. Suitable for measuring metal (such as steel, cast iron, aluminum, copper, etc.), plastic, ceramic, glass, glass fiber and other ... electromagnetic interference (EMI) electromagnetic interference (EMI)the whole with : thickness gauge, probe, alloy case, certificate of inspection, operation instruction manual.