Description Ernie Ball 12-56 Magnum Slinky 6-String Electric Guitar Set. Brand new from an authorized an Ernie Ball Dealer. Ernie Ball Nickel Wound Electric Guitar Strings are made from nickel plated steel wire wrapped around tin plated hex shaped steel core wire. The plain strings are made of specially tempered tin plated high carbon steel producing a well balanced tone for your guitar. Gauges .012, .016, .022w, .032, .044, .056 “I’ve heard of these before!” – Victor Moncebaiz of The Axe Palace