Detail 01
13-17-26-35-45-56 medium gauge
Use this exact six-string gauge sequence when matching your preferred replacement set.

Independent shopping perspective
Built as a medium-gauge 80/20 Bronze replacement set for acoustic guitar, the MA150 pairs high-tensile-strength core wire with tin plating across all six strings. That plating is intended to add corrosion resistance through regular practice and performance use. The listed 13-17-26-35-45-56 gauge sequence gives you a clear reference when replacing an existing set. Martin positions the wrap wire and construction around reliable, consistent tone from song to song.

Strong match
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
Use this exact six-string gauge sequence when matching your preferred replacement set.
Detail 02
The core-wire treatment is intended to add corrosion resistance.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
It is a medium-gauge set: 13-17-26-35-45-56.
This is an 80/20 Bronze acoustic guitar string set.