By combining a new and unique Quantum-Nickel with the highest possible standard in winding techniques, PURE BLUES bass strings achieve an unsurpassed sound and feel. Hand-wound on round cores for increased flexibility. DR strings are handmade (not machine-made) because our expert string makers are capable of making micro adjustments needed throughout the winding process for the best sound and feel possibleScale Length: 37 3/4" Material: Quantum-Nickel. .045 -.105 • MFSKU PB-45 • UPC 600781006095