Ernie Ball Slinky 6-String w/ small ball end 29 5/8 scale Baritone Guitar Strings - 13-72 Gauge. Ernie Ball Slinky Electric Strings are our top selling set, and are favored by many musicians around the globe. Regular Slinky strings are played by Eric Clapton, John Mayer, Steve Vai, and legions of guitar players worldwide. These strings are precision manufactured to the highest standards and most exacting specifications to ensure consistency, optimum performance, and long life. Regular Slinky wound strings are made from nickel plated steel wire wrapped around a hex shaped steel core wire.