Hohner Flex Case XL. When used only for diatonic harmonicas, up to 48 fit in the suitcase. Since the harmonicas are standing in the case, the entire content of the FlexCase XL can be seen at a glance during live performances.
This Hohner XL- Harmonica Bag was recommended to me by a professional harmonica player. It’s a thoughtful design, and I had a chance to see it utilized by a pro. If you are stepping up your skills and need to organize your harps with room to grow, this is smart and practical.