Chroma-NotesTM Stick-Ons are an excellent addition to the Chroma-NotesTM learning system. Adhere them to a variety of instruments to make learning consistent and fun. Add Chroma-Notes colors to your other ORFF instruments. THEY: ARE REMOVABLE ARE REUSABLE DO NOT LEAVE RESIDUE DO NOT AFFECT SOUND Each package contains 500 stick ons, consisting of: 300 DIATONIC WITH LETTERS 100 DIATONIC WITHOUT LETTERS 75 CHROMATICS WITH SHARP/FLAT SPELLING 25 CHROMATICS WITHOUT SHARP/FLAT SPELLING MOST IMPORTANT--the same color scheme as the Boomwhackers tubes!!!!!