... to PC3.With CE certifications 4.Supply OEM/ODM service Portable Digital Ultrasonic Thickness GaugeProduct InformationRange of Applications:Able to test ... any hard material,aluminum,copper, brass,zinc PVC,gray cast iron,and any other good ultrasonic wave conductor ... Cast iron, Aluminum, Red copper, Brass, Zinc, Quartz glass, Polyethylene, PVC, Gray cast iron, Nodular cast iron.(3)The unique blue ...