Description from Amazon USA : Like all the Martin SP Studio/Performance Series strings, the MSP4150 SP Phosphor Bronze Light/Medium acoustic guitar strings are ideal live, in the studio, or wherever maximum string life is desired. The creation of these high-performance Martin strings is a result of research done in cooperation with specialty steel producers. Due to the development of a top-notch 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 will enhance the beauty of your guitar, its purpose is much more functional to prolong brightness, guitar string life, and provide superior tonal quality to meet the high expectations of demanding musicians.
Cookies allow us to personalize content and ads, to provide social media-related features and analyze our traffic. We also share information on the use of our site with our social media partners, advertising and analytics, which can combine them with other information you have provided to them or collected in your use of their services.Close