Elixir Acoustic Guitar Custom Light PolyWeb Coating, .011 - .052, 11025star rating 5John GerrishJanuary 4, 2010I love Elixir strings! I finally replaced my previous Elixir set and the new ones are fantastic as I've become accustomed. I'm not practicing anywhere near enough, but they sure do work WELL on my Martin D37K. Thanks, don't change, and keep delivering good Elixir products! Many Thanks, John