Copper has a low resistivity and is an excellent conductor. However, China has limited reserves and it's relatively expensive, so it's selectively used in busbars for important high-current contact connections or in environments with corrosive gases. Aluminum has a conductivity of 62% that of copper, and by weight, an aluminum busbar of the same length carrying the same current weighs about half as much as a copper busbar. The larger cross-sectional area of aluminum busbars increases their surface area for heat dissipation, so the amount of aluminum busbar required to carry the same current over the same length is approximately 44% of that of copper busbar. Jinan Hefeng Aluminum Industry Co., Ltd. produces a variety of aluminum busbars and aluminum bars in numerous specifications.