Item #1520034 Model #41Y19MA535FX

Martin Authentic Acoustic Flexible Core Guitar Strings (Phosphor Bronze, Custom Light) Standard


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Flexible acoustic guitar strings with phosphor bronze wrap

Martin’s Authentic Acoustic Flexible Core strings aren’t just about flexibility — they’re about the freedom to bend the note until it rings true. 

These strings feel soft to the touch, making them ideal for beginners, but they’re also designed for professional players like Tommy Emmanuel, who performs with Flexible Core strings night after night. With a tensile-strength core wire, tin plating and high quality 92/8 Phosphor Bronze wrap, each string gives you consistent true tone that you can count on. 

With Flexible Core strings, you get total flexibility and control, while reducing finger fatigue for even the most complex fingerstyle and note-bending techniques.


  • 92/8 phosphor bronze wire wrap
  • Tin-plated core
  • Maximum flexibility for note-bending and fingerstyle
  • Custom light gauge