GHS R+EJL Nickel Rockers Eric Johnson Light Signature Electric Guitar Strings The perfect sound for all your guitar explosions Gauges: 10-13-18-26-38-50 Eric's signature Nickel Rockers guitar strings feature a round, pure nickel cover that is slightly flattened by metal rollers during the winding process Bright-sounding, great-feeling strings GHS has made the highest-quality strings since 1964