"AQUILA 140U THUNDERBLACK - BASS UKULELE STRING SET - GDAE TUNING The Italian string manufacturer Aquila attaches great importance to tradition, but at the same time it develops its own materials, which offer advantages in everyday use. Thunderblack is a special very elastic and dense material developed by us in our headquarter that assure superior performances over the common polyurethane and silicon rubber bass strings available in the market. Thundergut assure fast and stable intonation; no finger slip on the strings and powerful performances. FEATURES: - 1x String Set 140U ThunderBlack Bass Ukulele - Tuning: GDAE - Scale: (18"-21") - All 4 strings from THUNDERBLACK - Strings specially designed for Kala U-Bass and Ashbory Bass"