Includes 3 harmonicas in the keys of C, G, & A / Includes a booklet of historical facts, notable figures, & stories about the harmonica Hohner Harmonica's Special 20 Pro Pack features 3 harmonicas. Three harps in the keys of C, G, and A. The Pro Pack comes in display blister card packaging with selection information. Including a booklet of historical facts, notable figures, and stories about the harmonica entitled "That Musical PAL of Mine".