Developed in collaboration with John Mayer, Ernie Ball Earthwood Bell Bronze strings have been carefully crafted to meet John's exacting standards, providing a new voice for your acoustic guitar. Inspired by alloys used...

Developed in collaboration with John Mayer, Ernie Ball Earthwood Bell Bronze strings have been carefully crafted to meet John's exacting standards, providing a new voice for your acoustic guitar. Inspired by alloys used...