Natural driftwood collected from the sea in Izu. It has only been rinsed with water and dried in the sun, and has not undergone tannin removal or sinking tests. Please use it in aquariums, etc., at your own discretion. Please use it as a material for aquariums, terrariums, gardening, crafts, and DIY projects. *If you wish, I can include up to two small pieces of driftwood as a bonus, so please send me a message. Please choose from the last photo. (The bonus items are also available separately, and will be discontinued when they are gone.)