No. of Strings: 6-String Set Gauge Range: 9 - 42 Gauges: 9 , 11 , 16 , 24 , 32 , 42 . (Plain 3rd) Wrap Material: Pure Nickel Construction: Round Wound Hex Core / Round Core: Hex Core Ball End / Double Ball End: Ball End Coated / Non-Coated: Non-Coated Ernie Ball Classic Rock 'n' Roll Pure Nickel Electric Guitar Strings 9-42 Super Slinky 2253 Found in the same Slinky custom gauges and colour-coded packs, the Ernie Ball Classic Rock 'n' Roll electric strings are everything you love about Slinkys but with the full-bodied and warm tone inherent with a pure nickel wrap wire. Pure Nickel is so much more than 'vintage tone', it is rich sounding but with a smooth, fizzy brightness which, in nickel-plated strings can be lost or over-hyped. All Ernie Ball strings are produced in Coachella, California where the humidity is 0% so the strings can be packed in air and water-tight, foil packaging and never risk corrosion. When you open a set of Ernie Ball strings they'll be as fresh as the day they were made.