Martin mandolin strings, offered in a variety of wrap wire, are made to enhance the natural tone of your instrument. Designed to sound resonant and broken-in from day one and to live in the sweet spot of brightness for as long as you keep them on your instrument. Martin’s mandolin strings are built so you can spend less time tuning and more time playing. Martin M400 mandolin strings in 80/20 bronze are ideally suited for rich, warm tones and brilliant, long lasting trebles.