... , L1580, L1680, L1860, L2310 2. Material:Fiberboard 3. Keyboard:Spruce Grand Piano:A. Soundboard: Selection of natural high-quality ... madeof black walnut, cherry, Indian ebony, etc., C. Keyboard: Weight balance leaded technology, the choice of multi-layer basswood ... laminated keyboard.D. String Axes plate: Germany's traditional manufacturing ...