This Promaster diatonic harmonica model MR-350 by Suzuki is state of the art in harp technology. The phosphor bronze reed plates are among the most durable in the industry and the aluminum body is extremely tight and gives powerful and great tone. This is a diatonic 10 hole in the key of C (1st position, straight harp). Each comes in its own tough, zippered storage case. This special diatonic harmonica is great for blues, pop and folk genres.