Martin Classical Guitar Strings Martin M160 Silverplated Ball-End High Tension Classical Guitar Strings, Full Set with smooth, clear, monofilament nylon trebles with silver-plated copper over nylon basses. Ball-end. Total tension (lbs.) is 88.9. Gauges: E/1st .028 clear nylon B/2nd .032 clear nylon G/3rd .040 clear nylon D/4th .030 silverplated wound A/5th .035 silverplated wound E/6th .043 silverplated wound.