DAddario ECG25 Chromes Flat Wound Light 12-52 Electric Strings ECG25 one of D’Addario’s best selling flatwound sets delivers a smooth feel warm/mellow tone and tighter tension ideal for traditional jazz playing. 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.