3817 John Mayer Signature Silver Slinky 6pk is the 6-set pack of electric guitar strings that comes from the collaboration between Ernie Ball and John Mayer, with a 10.5-47 gauge, which until now had never existed in the Ernie Ball catalog. This set features unique diameters chosen by John Mayer and the reinforced smooth string section (RPS) for greater durability and tuning stability.