STRING SET FOR ACOUSTIC GUITAR String set D'Addario EJ41 2-String Phosphor Bronze, Extra Light, 9-45. The Ej41 is the lightest 12-string acoustic guitar string set by D'Addario, which gives it great playability without losing tone or projection. Gauges: E 009, E 009, B 013, B 013, G 021, G 008, D 029, D 011, A 036, A 016, E 045, E 026.