The guitar world’s best kept secret. Darco Electric Guitar and Bass Strings are the world’s best kept secret. With a loyal following, Darco strings offer consistent quality and tone for your electric or bass guitar. Give them a try! Darco Bass strings are made with tin plated steel core wire and compound nickel wound wrap wire. Set: D9705L Gauge: 5-String Light 45-65-80-105-125 Tension: 207.8 Package: 5 strings