Pure Blues bass strings combine a fat, warm punch with an edge especially designed for the modern bass player. 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 possible. Scale Length: 37 3/4''. Material: Quantum-Nickel. Round Core Wire with Ball End. Gauges: 45, 65, 85, 105, 130.