D'Addario and Co. - Who says changing strings isn't a ball? We make it easy with color-coded ball ends that clearly indicate each gauge in the set. | Facebook
A Closer Look: D'Addario XT strings | guitarguitar
No longer available - D'Addario Prism Bass strings 4 | TalkBass.com
Guitar String Color Codes (Beginners' Guide) - D'Addario & Others
What Guitar Strings Have Colored Ends? Ball End Color Code
NYXL1138PS Nickel Wound | Electric Guitar Strings | D'Addario
A Closer Look: D'Addario XT strings | guitarguitar