Transparent Hohner 10 Hole Harmonica 6 Colors to Choose From Key Of C (Blue) Listing is for one Brand New Hohner Clearly Colorful Translucent Harmonica: Includes a clear vinyl protective sleeve. Special harmonica for preschool kids have been developed, which serve as learning platform to growing children for a later musical training. Not recommended for childer under 3+. 10-hole harmonica with injection molded body and brass reeds Plastic Key of C. Brand: Hohner Packaging: Reuseable Plastic Sleeve Model: 10 hole, Key of C