Product Description XL Chromes are among the warmest, mellowest bass strings we have to offer. These flat wound strings provide an ultra-smooth feel and a dark, yet warm tone, while allowing movement across the fretboard with no finger noise. Made with a high carbon steel core, Chromes stainless steel flattened ribbon wrap wire is expertly wound onto a series of interlocking under-windings, then precisely polished for unparalleled smoothness and a tonal presence which blends beautifully into the mix. This 40-100 Regular Light gauge set has a nice even tension, bright tone, and tight low-end. From the Manufacturer ECB81, D'Addario's best-selling Flatwound bass strings, are known for their warm, mellow tone and smooth polished feel. Chromes deliver a deep, rich low bottom end which makes them the flat wound choice of Jazz, R&B and Pop musicians. Fits long scale basses with a string scale length of up to 36 1/4 inches. D'Addario Chromes Bass strings are wound with flattened stainless steel ribbon wire which is polished to an incredibly smooth surface. Delivering a distinctive damped, but tone-rich sound that only flatwounds can produce, D'Addario Chromes are the world's most popular flatwound strings.D'Addario, the world's largest manufacturer of musical instrument strings, is known as The Players Choice with a reputation for unsurpassed quality and consistency. D'Addario's innovative packaging reduces waste and provides protection from corrosion. All D'Addario strings are manufactured in the U.S.A. using proprietary, digitally controlled, state-of-the-art machinery for unmatched performance, set after set.