Ultrasonic Thickness Gauge ProGauge II magnetic coating thickness gauge ETG-2 Electronic Coating Thickness Gauge Ferrous & Non Ferrous Base 0-1000micron (Made in USA) ETG-N Electronic Coating Thickness Gauge Non Ferrous Base 0-1000micron (Made in USA) ETG-I Electronic Hard Chrome Plate Coating Thickness Gauge 0-1000micron (Made in USA) ETG-A Electronic Coating Thickness Gauge Ferrous Base 0-1000micron (Made in USA) CHUO SEISAKUSHO Thickness Tester TH-11 Ultrasonic Thickness Gauge (General purpose use) TI-45BA Ultrasonic Thickness Gauge (General purpose use) TI-45NA Ultrasonic Thickness Gauge (Data memory type) TI-100K Ultrasonic Thickness Gauge (General purpose use) TI-45CA