D'Addario EXP45 Coated Classical Guitar Strings, Normal Tension D'Addario's most popular classical string known for quality, consistency and a warm yet projecting tone. Part of the renowned D'Addario Pro-Arte series with highly accurate, laser sorted treble strings Normal tension, Clear Nylon, Non-Ball End Corrosion resistant packaging for fresh strings, always! All D'Addario strings are designed, engineered and manufactured in the USA at our New York facility to the most stringent quality controls in the industry