DR Strings Electric Guitar Strings, Black Beauties - Extra-Life, Black Coated, 9-42 Gauge: Light Black Coated Electric Guitar Strings on Hexagonal Core More volume, less unwanted overtones, greater clarity and articulation than standard, uncoated strings Provide protection due to corrosion and perspiration Increased tone life that coated strings are known for This coating includes a corrosion inhibiting lacquer for extra protection against damaging substances