Rhythm Band 13-Note Hand/Desk Bell Set (RB107C - 5 count + RB107 - 8 count) Unique double-function designExtremely durablePerfect intonationNote names and numbers on each bell 13 piece set - 5 pieces of RB107C-5 note Chromatic Add-On Set and 8 pieces of RB107-8 note Diatonic Add-On Set