These are oxygen free COPPER BUS BARS produced for high energy electro processing of basic minerals. Some joints are high polish, while others feature silver plating. While the majority of cathodes and anodes are copper, aluminum can also be used. All-Weld has also handled the di-electric requirements to produce a complete package. Thickness of the copper run up to 3″. These units are located in northern Ontario, while we have shipped others to southern Ontario, Quebec, western Canada and USA.