Martin SP 7100 Phosphor Bronze Lifespan Coated Acoustic Strings Light<div style="text-align: left;"><strong>[Product Information]</strong><ul><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"> Bright， but slightly warmer sound than 80/20 bronze when first put on the guitar </span></li><li><span class="a-list-item"> Recommended for lead rock， blues， and folk styles </span></li><li><span class="a-list-item"> Gauge (light): 12-16-25-32-42-54 </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51YpZBJQHHL.jpg" noproxy>