The range of alloys made use of is sensational: weathering steel for patina, marine-grade aluminum for weight financial savings

https://www.scribd.com/document/1058495293/Hold-the-Drift-Copper-Snow-Guards-that-Protect-for-Generations-134579

The series of alloys made use of is spectacular: weathering steel for aging, marine-grade aluminum for weight financial savings, and duplex stainless for rust resistance in harsh environments.