Ernie Ball Aluminum Bronze Medium Light Acoustic Set， .012 - .054<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Patented technology brings a new voice to acoustic guitarists who seek a more expressive and dynamic string </span></li><li><span class="a-list-item"> Aluminum Oxide provides a significant corrosion barrier， without coating the string </span></li><li><span class="a-list-item"> Featuring Maraging Steel Hex cores， for greater low-end， and note separation </span></li><li><span class="a-list-item"> Element Shield Packaging Prolongs string life and keeps strings as fresh as the day they were made </span></li><li><span class="a-list-item"> Made in California， U.S.A. Featuring the finest and freshest materials. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/61uh6QE0CrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/518rWMoadVL.jpg" noproxy>