Hawaiian D-Tuning, B F# D A (treb to bass), gauges are 022 028 032 022. Nylon with tie ends. D-tuning is said by some to bring out a sweeter tone in some ukuleles, generally smaller ones. This tuning was commonly used during the Hawaiian music boom of the early 20th century, and is often seen in sheet music from this period. Sealed in corrosion-free "NitroPack" packaging.