The Seydel Chromatic De Luxe is 12-hole, 48-note chromatic harp. Although earlier versions were constructed differently, the newer Chromatic De Luxe from Seydel has an acrylic glass body, which helps to make it extra airtight. Not only that, but the comb is also acrylic. So, it won’t swell or absorb water like a wood comb could over time. So, if you intend to play at outdoor events, this harmonica is a perfect choice. If you’re a purist, you can get this harmonica in the key of C, but other keys are available for those who like to experiment or round out their instrument collections.