The ECB80 by D'Addario, the lightest flatwound bass strings, are known for their warm, smooth sound and polished feel. Chromes provide a deep, rich bass range and are the preferred choice for jazz, R&B, and pop musicians. They fit long-scale 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 sacrificing punch, making them ideal for jazz musicians of all kinds. They are wrapped with flat-wound stainless steel wire and polished to an unmatched smoothness, which is why XL Chromes are the most popular flatwound strings worldwide. This set includes the lightest flatwound bass guitar strings, 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: wrapped .040, .060, .075, .095. Eco-friendly, corrosion-resistant packaging ensures that the strings stay fresh.