Martin Retro strings are the real deal. Not an imitation. With Martin Retro strings, you get one tough set that offers true, consistent tone and sounds like nothing else on the market. Martins solid nickel/copper alloy blend provides a reduced pick attack that allows the guitars tonewoods to be heard, not overshadowed. Martins proprietary Monel wrap wire is naturally corrosion resistant, so you can play them for a long time with nothing to get in the way of your music. Discover your guitars true voice. Retro strings offer enhanced longevity with warm natural tone, and they sound great plugged in.

Nickel/copper alloy blend acoustic Guitar strings
Monel wrap strings are naturally corrosion resistant
Light Gauge; .010/ .013/ .023/ .029/ .038/ .047
Enhanced longevity
Natural WARM tone, sounds great plugged in
Tension @ 149.54

String Gauges & Tension

Gauge	E	B	G	D	A	E	Tension	Model
Monel
Extra Light	.010	.013	.023	.029	.038	.047	131.6	MM10
Custom Light	.011	.014	.023	.031	.041	.052	149.5	MM11
Light	.012	.015	.025	.031	.041	.054	162.9	MM12
Medium	.013	.017	.026	.035	.045	.056	190.9	MM13
Extra Light 12-String	.010/.010	.013/.013	.023/.010	.029/.012	.038/.018	.047/.027	255.5	MM1012
Bluegrass Tony Rice	.013	.016	.026	.034	.044	.056	184.8	MTR13
Medium/Light Laurence Juber	.013	.017	.024	.032	.042	.056	175.5	MLJ13