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
Lot 3 Martin M600 Ukulele Strings Clear Fluorocarbon Soprano Conc .0191 - .0216 – SALES BARON
Martin M600 Standard Ukulele Strings for sale online | eBay