ACOUSTIC GUITAR STRINGS MEDIUM: .013 .017 .026w .036 .046 .056 Bright Bronze by GHS Strings truly live up to their name. Boasting a specially tempered 80/20 copper-zinc alloy wound over a hex core, the Bright Bronze series delivers an excepionally brilliant tone. GHS' core to cover ratio provides increased flexibility while also contributing to the bright tone. In other words, if you're looking for a bright 80/20 bronze string, here it is! GHS-BB40M$5.34