GHS Strings R+RXL Nickel Rockers, Rollerwound Pure Nickel Electric Guitar Strings, Extra Light (.009-.042) Model: R+RXL Featuring NitroPack singles, guaranteed fresh from the factory! Rollerwound Pure Nickel on a Hex Core Semi-flat strings featuring a warm & articulate tone. Extra Light Gauge: 009-011-016-024-032-042