D'Addario EJ26 Phosphor Bronze Custom Light 11-52 Acoustic Guitar Strings are a perfect choice for guitarists looking for a bright and balanced tone. With a custom light gauge of .011-.052, these strings provide an easy playability and a warmer tone that is perfect for acoustic guitars. These strings are made of phosphor bronze, which offers a bright and balanced tone with excellent projection. They are also coated with a corrosion-resistant coating, making them durable and long-lasting. These strings are suitable for acoustic guitars and are a great choice for both beginner and professional guitarists.