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. Made for 5-string basses, this 45-135 Regular Light Top/Medium Bottom gauge set has a great mix of tighter low-end with a comfortably balanced, bright top. • MFSKU EXL165-5 • UPC 019954961121