3 sets of Fender Super 250s Nickelplated Steel 250R Ball End Electric Guitar Strings in sealed packaging. Gauges: .010, .013, .017, .026, .036, .046 Fender Super 250’s Nickel-Plated Steel (NPS) strings combine the high output and dynamic sound of steel with the smooth feel of nickel; perfect for rock and other styles of music where the guitar needs to cut through.