Martin MSP6100 SP Lifespan 80/20 Bronze Light Acoustic Guitar Strings<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Treated with Martin's Clear tone proprietary technology for a longer lifespan than regular strings </span></li><li><span class="a-list-item"> Designed to repel the oils and dirt that can deaden strings </span></li><li><span class="a-list-item"> 80/20 bronze provides a bright and vibrant tone </span></li><li><span class="a-list-item"> Gauge (light): .012， .016， .025， .032， .042， .054 </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51M7FWC7ewL.jpg" noproxy>