Next generation MartinAuthentic Acoustic Lifespan2.0 strings are engineered using a new, patented anti-corrosion treatment only available from Martin. It protects the core and wrap wire to prevent corrosion without compromising tone or feel. Our impeccable standards for acoustic guitar tone are embedded in our string design and precision manufacturing process. Thats why we make our own.

STRING GAUGES AND TENSION

Gauge	E	B	G	D	A	E	Tension	Model
80/20 BRONZE
Extra Light	.010	.014	.023	.030	.039	.047	135.8	MA170T
Custom Light	.011	.015	.023	.032	.042	.052	153.7	MA175T
Light	.012	.016	.025	.032	.042	.054	167.3	MA140T
Medium	.013	.017	.026	.035	.045	.056	189.6	MA150T
Extra Light 12-String	.010 .010	.014 .014	.023 .010	.030 .012	.039 .018	.047 .027	261.7	MA180T
92/8 PHOSPHOR BRONZE
Extra Light	.010	.014	.023	.030	.039	.047	137.0	MA530T
Custom Light	.011	.015	.023	.032	.042	.052	155.1	MA535T
Light	.012	.016	.025	.032	.042	.054	168.5	MA540T
Medium	.013	.017	.026	.035	.045	.056	190.9	MA550T
Extra Light 12-String	.010 .010	.014 .014	.023 .010	.030 .012	.039 .018	.047 .027	263.3	MA500T