Nano-Carbon Shield AOT Coated Nickel Round Wound Bass StringsBlackSmith electric bass strings are made with the finest materials and manufactured using state-of-the-art automatic servo controlled winding equipment. USA made nickel and steel ensures a long lasting string with increased sustain and purer tone.Our proprietary computer controlled winding technology produces bass strings with a very consistent wrap surface and even tension, resulting in stable tuning, accurate intonation, and superior playability.The Nano Carbon Shield AOT (anti oxidation technology) coating prevents oxidation and dirt build-up on the wound strings without blocking the string ground conductivity like other brands – a BlackSmith exclusive!! With BlackSmith Nano Carbon Shield coated electric bass strings, you will experience the perfect balance of consistency, tone, and playability. Vacuum Sealed in Patented Anti Kink Packaging Prevents Oxidation and String Damage.