Size: 68 cm x 15 cm x maximum thickness 7 cm Weight: 600 grams High-pressure washed, brush washed, and treated with 75°C baking soda water for 3 hours, then left for 3 days. After that, it was soaked in fresh water for 10 days to remove tannins and salt. However, this is amateur treatment, so it is not perfect. There may be small stones and sand. Please understand. Driftwood