Sweetwater Sales Engineers have the gear knowledge and the real-world experience to answer your questions about the Martin MSP6100 SP Lifespan 80/20 Bronze Acoustic Strings (.012-.054 Light 2-Pack). We'll be happy to take all the time you need to help you decide whether this is the right product for you. Submit your questions below and we'll get right back to you. Name, Email and Questions/Comments are required.