I have kept this in long-term storage, but it is new and unopened. The Premium 21 (Model No.: 3521Am) tremolo harmonica is a resin-bodied tremolo harmonica developed with a new concept, focusing on tone, playability, and durability. Despite being made of resin, it was developed with the aim of maintaining the excellent tone of wooden-bodied harmonicas as much as possible, rather than the typical "resin tone." Wooden-bodied harmonicas have the issue of being affected by moisture. By adopting resin, durability is improved, and the advantages of resin, such as volume and quick response, are also added. This harmonica achieves both high-quality tone and durability.