Easttop Dreamer T12-48B Black 12 Hole 48 Tone C Key Chromatic Harmonica 1. Imported phosphor bronze reed(Sound Spring):Copper content 99.99%,anticorrosion, antifatigue with brighter tone. 2. Germany equipment:The Sino-German joint venture DMG CNC planer spring machine,guarantee the sound spring intonation. 3. Thicken Copper plate, 1mm copper plate makes the harmonica sound more clear and melodious. 4. Cover design:thicken copper cover plate,fine printing design with enough hardness,it is not easy to deform with long time playing. 5. Sensitive inflexion key and blow hole: High hardness metal inflexion keys,solid and non deformation, switch to normal tone and chromatic, can play any complex music.