S I T Strings Electric Guitar Nickel Power Wound Heavy Bottom, .010 - .052, S1052 1st E Plain Steel .010 2nd B Plain Steel .013 3rd G Plain Steel .017 4th D Nickel Plated Steel .030 5th A Nickel Plated Steel .042 6th E Nickel Plated Steel .052 Power Wound "The "Stay-in-Tune" strings that made us famous! Nickel plated cover wrap over a hard-tempered "Swedish Steel" hex core. Our most popular and widely used electric guitar set."