Ernie Ball 2220 Power Slinky Electric Guitar Strings - Buy 10, Get 2 Free Gauges 11-14-18-28-38-48 Ernie Ball 2220 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 replacement strings are precision manufactured to the highest standards and most exacting specs to assure consistency, optimum performance, and long life Jimmy Page, Eric Clapton, Steve Vai, and Slash are among the long list of Ernie Ball Slinky players