Tone Wood
| Types of wood | spruce |
| Quality | exclusive range: knotless timber, very close annual rings, perfect fibres |
| Thickness | by customer request |
| Width | by customer request |
| Length | mainly 4 m |
| Moisture content | fresh cut or kiln- dried |
| Design | edged or un-edged |
| Usage | sounding boards for grand pianos and upright pianos, stringed instruments |