ECB84 is a popular DAddario hybrid custom light Flatwound set combining the high strings from an ECB80 (.40 and .060) and the low strings from an ECB81 (.80 and .100). This set is optimal for players looking for a more comfortable playing tension in their flatwound sets while still maintaining a rich low bottom end . Fits long scale basses with a string scale length of up to 36 1/4 inches. DAddario 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 DAddario Chromes are the worlds most popular flatwound strings. DAddario the worlds largest manufacturer of musical instrument strings is known as The Players Choice with a reputation for unsurpassed quality and consistency. DAddarios innovative environmentally friendly packaging reduces waste and provides protection from corrosion. All DAddario strings are manufactured in the U.S.A. using proprietary digitally controlled state-of-the-art machinery for unmatched performance set after set. Features/Specifications: DAddarios hybrid custom light gauge flatwound bass guitar set Ribbon wound and polished for ultra-smooth feel and warm mellow tone Fits long scale basses with a string scale length of up to 36 1/4 inches Made in the U.S.A. for the highest quality and performance String Gauges: Wound: .040 .060 .080 .100