DR Strings Bass Strings, Black Beauties BASS Black Coated Nickel Plated Bass Guitar Strings on Round Core Gauge: Medium (5-String) Hand-made with black polymer coat Signature crisp tone, clarity, and volume of DR's traditional handmade strings Super-thin coating on the plain strings and on the wrap wire Extended string life The wrap wire is coated before the string is wound This coating includes a corrosion inhibiting lacquer for extra protection against damaging substances such as perspiration, dirt