D’Addario ECB81 Flatwound Light XL Chromes Long Scale Bass Guitar Strings 45-100D'Addario ECB81 XL Chromes Flatwound Long Scale Bass Guitar Strings, Light Gauge ECB81 is a light gauge flat wound string set for long scale electric bass. XL Chromes are noted for their smooth feel and warm, mellow tone, essential to the sound and style of many jazz, blues, and rock players. 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