Optimized for Baritone Ukuleles tuned to standard D-G-B-E tuning- / Pro-Arté Custom Extruded Nylon for highly accurate, laser sorted treble strings / Preferred for their warm and long lasting tone / Baritone Ukulele, Pro-Arté Custom Extruded Clear Nylon, Silver-Plated Copper Wound, Non-Ball End / Made in the U.S.A. for the highest quality and performance / Environmentally friendly, corrosion resistant packaging for strings that are always fresh