ELECTRIC GUITAR STRINGS LIGHT: .010 .013 .017 .026w .036 .046 Black Diamond coats all the strings in this set with a black-colored polymer coating that serves a double-duty. 1. It keeps the oils, acids, grit, and grime off your strings to improve the string life. 2. They don't look like everybody else's strings. These strings are cool black! BD-N477LB$9.43 String Coatings for Longer String Life