ABS resin , thick brass plated for seat plate, improve the air tightness and sound of the harmonica. The 24 Hole Harmonica is designed for beginners, practicing, and intermediate players. This harmonica is excellent for playing, as well as an accompaniment for guitar and other instruments. with phosphor bronze and metal cover make your harmonica more comfortable and music more melodious. Customized piano for case, stainless steel panel, high hardness, fading, oxidation. Smooth cover with fine printing, elegant appearance and easy to hold.