I found these at the beach near my home (^^) It's a set of 5 large driftwood pieces! The first photo shows everything. The photos from the fourth one onwards show different arrangements. I haven't removed the tannins, but I have: Washed them with water and a brush → dried them in the sun → brushed them. ⚪︎ Although I have cleaned them, there may be some remaining dirt, sand, or mold that I couldn't completely remove. ⚪︎ If you intend to use them for living organisms, please clean them and remove the tannins. ⚪︎ I will pack them in a box as is. ⚪︎ There may be breaks, chips, or peeling of the surface during transport. Instant purchase is OK!