Approximately 82 x 19 cm, thickness 2.2 cm. How about a driftwood board? Free use: Welcome board DIY Driftwood art Interior decoration Houseplants Other wide range of uses. Driftwood with tannin removal treatment. Collected on 2025. Location: Chikugo River upstream, Fukuoka Prefecture. Tannin removal process: High-pressure, high-heat cleaning Brushing Boiling sterilization at approximately 65°C (approx. 2 hours) We are particular about the temperature and time. Water soaking (30 days) (Using driftwood-specific super activated carbon "Black Hole") Washing and brushing Sun drying Kou-chan's driftwood is finished and listed in about 60 days. UV sterilization If you have any questions or would like additional information, please comment. Many other items are also on sale. High quality, good shape, many available, so please take a look.