The range of alloys used is spectacular: weathering steel for aging, marine-grade light weight aluminum for weight savings
https://keeganvpbx510.bearsfanteamshop.com/the-heritage-of-hand-fabricated-metal-custom-made-leader-boxes-designed-to-sustain-a-century
The range of alloys made use of is sensational: weathering steel for aging, marine-grade aluminum for weight financial savings, and duplex stainless for corrosion resistance in harsh climates.