Type of Wood: Nussbaum Wurzel
Process: Turned semidry. Hollowed through an dead branch hole with selfmade tools.
Diameter: 150 Millimeters
Height: 150 Millimeters
Wall thickness: 3 Millimeters
Surface: 3 Layers finishing oil, then polished to a high glossy finish. The last polishing Step was Carnauba wax.
more about the hollow form under this [link]