Ernie Ball 3817EB John Mayer Silver Slinky Signature Electric Guitar Strings - 6 PackSilver Slinky Strings are the result of an extraordinary partnership between Ernie Ball and John Mayer. They feature a never before offered gauge combination along with Reinforced Plain Strings (RPS) for added tuning stability and durability. Each string has been meticulously engineered with specific gauges and core to wrap ratios to meet Johns exacting standards, delivering the perfect balance of tone and tension. Features Never before offered gauge