Made from pure nickel wire wrapped around tin plated hex shaped steel core wire. These guitar strings produce a warm rich tone. Ernie Ball is the pioneer of Rock and Roll guitar strings. Since setting the industry standard for electric strings, the list of Slinky users has grown to include the likes of Jimmy Page, Eric Clapton, Steve Vai and Slash. If you like tone, you like Slinkys! Gauges .010 .013 .017 .026 .036 .046. Part number 2251.