D'Addario EPS300 ProSteels Bass Guitar Strings Custom Light, 43-107, Long Scale A special combination of custom string gauges for an ideal blend of tone and feel with bigger bottom end D'Addario's brightest and most magnetic bass strings offering harmonically rich, deep and penetrating tone Fits long scale basses with a string scale length of up to 36 7/8 inches Made in the U.S.A. for the highest quality and performance String Gauges: Wound .043, .063, .085, .107