I am selling the surplus. External dimensions: Width 100mm x Depth 100mm x Height 9mm Surface material: Paulownia wood Surface finish: Oil painting Handling precautions What is Ukuri (wood grain raising)? Ukuri is a traditional technique that enhances the appearance of wood by polishing and shaving off the soft parts (spring grain) of a wooden board, bringing out the wood grain. Correction Association Prison Work Cooperation Department (Sapporo)