Martin M600 Standard Ukulele Strings Go to amazon.com Related posts strings ukulele buyer's guide for 2019 FeatureAllows you to tune-to-pitch tension while minimizing string elongationOffer a rich, amplified toneGauges: M600 Soprano .0191 .0256 .0340 .0216 DescriptionMartin M600 Standard Crystal Nylon Ukulele Strings produce a mellow ukulele tone and have exceptional longevity.