If you are experiencing problems with breaking strings then this article may help isolate some issues.
”Strings do break from age or because of a flaw in the string but most string breakages are caused by a problem with the instrument…”
ECB82, D'Addario’s heaviest 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 ¼ 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’s medium 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 ¼ inches
Made in the U.S.A. for the highest quality and performance
String Gauges: Wound .050, .070, .085, .105