The BlackSmith APB-1152 features nano-coated phosphor bronze wound strings with Sub-Zero treated steel cores for a warm, rich tone and lasting brightness. The advanced AOT Nano-Carbon Shield coating protects against oxidation and dirt, extending string life without compromising tone. With precise servo-controlled winding, these strings deliver smooth playability, stable tuning, and accurate intonation. Vacuum-sealed packaging keeps strings fresh and kink-free, perfect for acoustic players seeking durability and clear sound.