ELECTRIC GUITAR STRING SET 3-Pack of PURE BLUES PHR-10 electric guitar string sets. Constructed with pure nickel wire on a round core to produce a distinctive warm and balanced sound with rich nuances and a vintage tone. They create the unmistakable tone and feel of classic American rock and blues, with chords that sound sweet and round, while leads have more punch and sustain. They feel smooth and pliable. Pure Nickel Electric Guitar Strings wound on Round Cores. Pure nickel wound on round cores. Really Vintage. Medium. 10-13-17-26-36-46.