D'Addario EJ87T sets are designed for use with tenor ukuleles utilizing our bright sounding titanium material. This set is optimized for standard GCEA tuning. D'Addario Titanium Ukulele strings are crafted from a dense monofilament material that has an attractive, translucent purple hue and a polished, smooth feel similar to nylon. This unique material is particularly beneficial to Ukulele's due to its slightly brighter tone and increased projection, resulting in more volume, clarity and dynamics.