Stand the test of time with strings that endure. D'Addario XT strings offer extended lifespan while maintaining the tone and feel of your favorite uncoated string. By utilizing the proprietary Composite basses and precisely intonated trebles of their legendary Pro-Arte strings, D'Addario XT delivers dynamic response and long-lasting performance. These strings are made to stay, for performance that never fades away. Silverplated copper, normal tension, 028, 032, 040, 028w, 035w, 044w.