The D'Addario EJ15 Phosphor Bronze strings are an extra-light gauge set that provides a warm, well-balanced acoustic tone with exceptional playability. Featuring a 10-47 gauge, these strings are the lightest phosphor bronze option available, making them perfect for beginners, vintage instruments with delicate bracing, or players who prioritize a soft touch and easy string bending. Since their introduction in 1974, D'Addario's Phosphor Bronze alloy has become the industry standard for its rich, complex harmonics and superior corrosion resistance, offering a much longer tonal life than traditional bronze sets. Wound on a high-carbon steel hex core, the EJ15s deliver a consistently clear, sweet sustain and reliable intonation, providing a professional sound for any acoustic guitar without the hand fatigue of heavier tensions.