Curt Mangan make premium quality guitar strings without the premium price tag, and these phosphor bronze acoustic guitar strings are no exception. Based out of Colorado USA, Curt Mangan are a small company making all their strings out of USA made wire with an emphasis on providing "big tone". These bass strings are made from nickel-plated steel which has a bright yet balanced tone for a versatile sound.
Here's What Curt Mangan Say About Their Nickel Wound Bass Strings:
Nickel-Plated Steel wound strings were introduced in the late Sixties and have become the most popular alloy for electric guitars and bass. Nickel-plated steel tends to offer the most balanced tone.