{"product_id":"martin-mm13-acoustic-guitar-set","title":"Martin MM13 Retro Monel Acoustic Guitar Strings, Medium","description":"Strings are tin-plated steel core wire and Monel wrap (a proprietary blend of nickel \u0026amp; copper), medium gauge set 013 017 026w 035w 045w 056w.","brand":"Martin","offers":[{"title":"Default Title","offer_id":26855810957376,"sku":"MM13","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0147\/9412\/9472\/files\/mm13.webp?v=1743792572","url":"https:\/\/www.elderly.surf\/products\/martin-mm13-acoustic-guitar-set","provider":"Elderly Instruments","version":"1.0","type":"link"}