This set of Martin guitar strings is a great choice for acoustic guitar players. They are designed to provide excellent sound quality and long-lasting performance. Whether you are a professional musician or just starting out, these strings will help you achieve the perfect tone for your music. The set includes both MQ 26 and MQ 56 strings, which are compatible with a wide range of acoustic guitars. They are easy to install and will stay in tune for a long time, so you can focus on playing your music instead of worrying about your equipment.  New and remain in original package.  Package was never sealed.  Strings have unwound slightly so flap of envelope is now open.  See photos.  I have other guitar strings for sale as well.  Thanks for your interest.