UKELELE STRING SET D'Addario EJ87B Titanium Ukulele Baritone string set for ukulele. The 3rd and 4th strings are made of silver-plated copper on nylon string and the 1st and 2nd strings are Titanium. Optimized for standard DGBE tuned Baritone Ukuleles. Caliber: Titanium .028, .033, Copper Silver: .030W, .035W. D'Addario Titanium Ukulele strings are made from a dense monofilament material that has an attractive translucent purple hue and a smooth, polished feel similar to nylon. This unique material is particularly beneficial to the Ukulele, due to its slightly brighter and more projected tone, resulting in more volume, clarity and dynamics.