D'Addario ECB82, the heaviest flatwound bass strings, are known for their warm, smooth sound and polished feel. Chromes deliver a deep, rich bass range and are the preferred choice of jazz, R&B, and pop musicians. They fit longscale basses with a string length of up to 36 1/4 inches. D'Addario XL Chromes are the industry standard for flatwound guitar strings, offering a round, full bass range without losing punch, making them ideal for jazz musicians of all kinds. They are wrapped with flat-wound stainless steel ribbon wire and polished to an unmatched smoothness, which is why it's no surprise that XL Chromes are the most popular flatwound strings worldwide. This medium gauge flatwound bass guitar set is ribbon-wound and polished for an ultra-smooth feel and warm, gentle sound. Made in the USA for the highest quality and performance. String gauges: Wound .050, .070, .085, .105. Eco-friendly, corrosion-resistant packaging ensures that the strings stay fresh.