Ernie Ball 2921 M-Steel Regular Slinky 10-46 Electric Guitar Strings. The Ernie Ball 2921 M-Steel Regular Slinky 10-46 are a set of electric guitar strings made with a “Maraging” steel alloy and with regular scaling .010 .013 .017 .026w .036w .046w. M-Steels produce a rich, full tone and offer greater output, greater stability and greater durability
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