Medium handmade 6 string set for acoustic guitar from Sunbeams series that delivers a wonderful sustain. It contains phosphor bronze strings that are hand-wound on round cores. They offer a tone that does not seem to decay as much as the tone of other phosphor bronze strings. Phosphor bronze windings of these strings seem to sustain in a straight line and deliver musically bright and rich sound. Strings are also incredibly flexible. Gauges: .012, .016, .024, .032, .042, .054.