Martin Guitars SP Bronze 13-56 Medium

The creation of these high performance strings is a result of research done in cooperation with specialty steel producers. Due to the development of an industry leading, ultra-high quality steel core, Martin SP strings resist breakage better than average strings.

In addition, both the core wires and the plain strings are plated with a smooth, acoustic bronze finish. Though this golden bronze finish does enhance the beauty of your guitar, it's purpose is much more functional: to prolong brightness, string life and superior tonal quality to meet the high expectations of demanding musicians. Martin SP strings are available in 80/20 Bronze extra-light, custom light, light and medium gauges for 6-string acoustic guitars and an extra-light gauge for 12-string acoustic guitars.