 Martin Msp7600 12-String Sp Lifespan Phosphor Bronze Extra Light Acoustic Guitar StringsGauges:10-14-23-30-39-4710-14-10-12-18-27Martin SP Lifespan strings are the next level in studio performance. Treated for long life, they repel dirt, grit and other environmental elements that can quickly alter the sound of your strings. The treatment is so incredibly thin, you won’t even know it’s there. SP Lifespans are designed to last longer and sound better so you can play on! Accessories, Strings, Guitar Strings, Acoustic Guitar Strings, 12 String Sets for Acoustic Guitar Martin 41MSP7600 Martin, 12 String Sets for Acoustic Guitar |