These strings are specifically designed for resophonic/resonator guitars (often metal-body or wood-body “dobro” style). 
Gauge: .016, .018p, .028w, .035, .045, .056. 
Construction: Phosphor bronze wrap wire over a hexagon high-carbon steel core. 
Packaging: corrosion-resistant sealed packaging (ensuring freshness). 
Tone & feel: described as “warm, well-balanced acoustic tone,” with good resilience and comfortable feel.