D'Addario EXL170-12 XL Nickel Wound Electric Bass Strings 12-String 18-45XL Nickel are the industry standard in electric bass strings. With their clear fundamentals, booming tight lows, and reliable DAddario construction, theyre trusted by players everywhere to handle any performance. XL Nickel bass strings are made with a high carbon steel core and wound with nickel plated steel wrap wire, for consistently bright tone and smooth playability, great for a wide variety of bass styles. This 18 45 Regular Light set is a 12