For decades, La Bella has been supplying the worlds top ukulele players and luthiers with high-quality strings. From Soprano, Tenor, Baritone to Banjo Ukulele, La Bella Strings covers all your ukulele needs.- Made with high quality black nylon to ensure perfect intonation- String Gauges: .028, .032, .040, .028- Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness