Martin & Co. Clapton's Choice Acoustic Guitar Strings. MEC12 Phosphor Bronze Light .012-.054. New, in sealed box. Should you have any questions regarding condition, shipping, etc. please feel free to ask. I will combine shipping on multiple items. Your item will be properly packaged and protected to ensure that it arrives in the condition that you expect. I want you to be happy with your purchase and will do what it takes to make that happen.