Ernie Ball Strings Have Been A Top Choice For Players Of All Types Since The Early 1960s, When Guitarists Came Into Ernie Ball's Music Store, Customizing Their String Gauges To Make Their Axes Easier To Play. After Fruitless Attempts To Interest Major Guitar Manufacturers In A Lighter Set Of Strings, Ernie Ball Decided To Start Making His Own. Ernie's Slinky Acoustic Phosphor Bronze Strings Are Made From 92% Copper, 7.7% Tin, And 0.3% Phosphorus Wire Wrapped Around Tin-Plated Hex-Shaped Steel Core Wire. They Have A Light Orange, Gold Color And Deliver An Exceptionally Mellow Tone, With Excellent Clarity.