D'Addario, Great American Bronze 85-15 Bronze roundwound acoustic guitar strings. Full crucial low end , to a great degree brilliant top of the line, considerably more tonal reach than 80/20 bronze strings. Awesome American bronze strings consolidate the splendor of 80/20 amalgam strings with the considerable maintain and enduring qualities of phosphor bronze. The 85/15 Bronze wrap wire is accuracy wound onto a painstakingly drawn, hexagonally formed high carbon steel center, bringing about durable, brilliant sounding tone with superb inflection.A prominent decision for electric players using a piezo pickup