D'Addario EXPR160 Reds Bass Guitar Strings, Medium, 50-105, Long Scale EXP/Copper coating for a more "acoustic" tone on basses with magnetic and/or piezo pickups Round wound with nickelplated steel for a distinctive bright tone with clear fundamentals Fits long scale basses with a string scale length of up to 36 1/4 inches Made in the U.S.A. for the highest quality and performance String Gauges: Wound .050, .070, .085, .105