Sets included 3 x Ernie Ball 2220 Nickel Wound Power Slinky 3 x Ernie Ball 1011 Single Guitar Strings Gauge: 11 - 48 Gauges (High to Low) 11 , 14 , 18 , 28 , 38 , 48 Wrap Material: Nickel Plated Construction: Round Wound Ball End / Loop End: Ball End Coated / Non-Coated: Non-Coated Ernie Ball 3220 Nickel Wound Electric Guitar Strings 11-48 Power Slinky 3-Pack + 3 x .011 High E-String Bundle Gauges 11-14-18-28-38-48. Ernie Ball 3220 Power Slinkys in the purple package are made from nickel-plated steel wire wrapped around tin-plated hex-shaped steel-core wire. Produce a well-balanced, all-around good sound. Ernie Ball strings are precision manufactured to the highest standards and most exacting specs to assure consistency, optimum performance, and long life. Ernie Ball is the pioneer of rock and roll guitar strings. Setting the standard for the industry has enabled Slinky electric guitar strings to become the world's top selling brand. Jimmy Page, Eric Clapton, Steve Vai, and Slash are among the long list of Slinky players.