REED Instruments, TM-8811-KIT, Ultrasonic Thickness Gauge with 5-Step Calibration Block TM-8811-KIT Includes Only: REED TM-8811 Ultrasonic Thickness Gauge REED R9060 5-Step Calibration Block Features: Measures the thickness of steel, cast iron, aluminum, red copper, zinc, quartz glass, polyethylene, PVC, grey cast iron and nodular cast iron Large, easy-to-read LCD display Displays sound velocity at the touch of a button Automatic material calibration User selectable unit of measure (in/mm) Low battery indicator Applications: Monitoring and verifying pipes and pressure vessels Industrial manufacturing