New Martin ukulele strings, they call it “POLYGUT” they developed it exclusively with Aquila.M605 polygut strings. A new one to try 😊☺️🤗 with my Kiwaya KTS-4 : r/ukulele
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Martin M600 Soprano/Concert Ukulele Strings 10-PACK Clear Fluorocarbon (.0191-.0216) | guitar pedals for any genre
Review: Martin Ukulele Premium Strings | Ukulele Magazine