ECG24, D'Addario's best selling gauge of flatwound strings, delivers a balance of smooth feel, warm/mellow sound and optimal tension, ideal for vintage jazz, rockabilly twang, R&B and some pop/rock styles.D'Addario Chromes are wound with flattened stainless steel ribbon wire which is polished to an incredibly smooth surface. Chromes deliver a distinctive damped but tone-rich sound that only flatwounds can produce. D'Addario Chromes are the world's most popular flatwound strings.FeaturesJazz Light Gauges:.011, .015, .022w, .030w, .040w, .050w