Individually or as a 13 piece set. The 13 piece musical tuning fork set comes with the standard 8 forks which cover the range of middle to high C on a piano. It also includes the popular A440 and E329 guitar fork as well as all the sharps (black keys on a piano). 8 standard music tuning forks C261.6; D293.7, E329.6; F349.2, G392; A440, B493.9; C523.3 5 sharps tuning forks C#277.2, D#311.1, F#370, G#415.3, A#466.2 This set comes in an elegant carrying case and makes a great gift for a graduating music student, music teacher or professional musician.