Ernie Ball 3123 Coated Super Slinky Electric Guitar Strings (09-42) combine the latest technological advancements in string manufacturing. All wound strings are treated with a micro-thin layer of enamel that prevents decay and corrosion up to five times more than uncoated sets. Each plain string features a rust-resistant plating along with a patented reinforcement winding of titanium wire. Ernie Ball Coated Slinky guitar strings maintain the feel and sound of uncoated sets, combining the added protection with the vibrant tone Ernie Ball musicians have relied on for over 50 years. All Ernie Ball strings are precision manufactured to the highest standards and the most exacting specs to assure consistency, optimum performance, and long life. Ernie Ball is a pioneer of rock and roll guitar strings. Jimmy Page, Eric Clapton, Steve Vai, and Slash are among the long list of Slinky players. Gauges: 09-11-16-24w-32-42. 2 Sets of Strings