AR850 Metal PVC Glass Ultrasonic Thickness Meter Gauge is suitable for many different materials including steel, cast iron, aluminum, red copper, brass, zinc, quartz glass, polyethylene PVC, gray cast iron, nodular cast iron and other materials. Dual probe extended your measure range to every possible need in your area. it is professional tester and with multi-function. What's more, it is easy to use. A brand-new, unused,unopened, undamaged item in its original packaging.