Congratulations and thank you for purchasing CoreBond by Black Diamond Strings.
This is your portal for specialized customer service and offers for your CoreBond strings.
REGISTER FOR YOUR 60 Day Warranty
Strings are subjective, we understand that players have their view of when a string has lost its tone. At Black Diamond Strings, we are so confident in Core-Bond ™️ technology, we offer free replacements within 60 days of purchase for any string you feel tone loss is experienced. (At this time, replacements are available to USA customers only)
As a Core-Bond ™️ user, any products you purchase are now covered by our Factory Warranty.