C.F. Martin Acoustic Martin 92/8 Phosphor Bronze Medium, .013 - .056, M-550star rating 5D E MartinMarch 7, 2010These strings are great and will not disappoint. If you want consistency and quality in a string... you will enjoy these. The balance you will experience when you hear these strings is delightful. Your bass and treble are equal. I like a bassy noise balanced with clear high notes. Price is very nice, and they will last as long or longer than any equal priced string.