NPS 8-string Electric Guitar Strings (10-74). Gauges .10 .13 .17 .30 .42 .54 .64 .74. Dunlop Electric Nickel Wound Eight String sets are specifically designed for tonal and tactile balance with each string carefully chosen for clarity and definition as well as for optimal tension. Like all Dunlop Strings, these sets are crafted with innovative formulas and wrapping techniques so they break in fast, tune up quickly and hold their "sweet" spot for a long time.