DR Rare Mandolin Strings are designed to last longer than other strings. They have a tone that will surprise and please all players. Crisp & warm, DR Rare Phosphor bronze mandolin strings stand out whether you're playing in a group or as a featured soloist. Gauges: MD-10 Lite 10 14 24 36 MD-11 Medium 11 15 26 40 MD-12 Heavy 12 16 28 41