DR Strings Bass Extra Life Black Coated 5s, .045-.125, Black Beauties, MR5-BK-45 1st G EXTRA-Life Black Coated Round Wound .045 2nd D EXTRA-Life Black Coated Round Wound .065 3rd A EXTRA-Life Black Coated Round Wound .085 4th E EXTRA-Life Black Coated Round Wound .105 5th B EXTRA-Life Black Coated Round Wound .125 EXTRA-Life Coated Strings. DR's EXTRA-Life bass strings are the world's finest coated bass strings. The coating includes a corrosion inhibitor for extra protection against damaging substances such as prespiration, dirt, humidity, and "acid hands". DR's EXTRA-Life offers players a superior coated string without sacrificing the tone, clarity and volume of DR HandMade uncoated strings."