FFC Pyro Bath Ceramics. This is a product called "FFC Pyro Bath" from Akatsuka Co., Ltd., which uses FFC ceramics. It was recommended to me in 2023, and I obtained several of them, as it is said to modify and activate water when placed in bath water. Since it cannot be used with bath additives, I used these several times in an outdoor water basin for plants. The one I kept constantly immersed has damaged stainless steel, and I will be listing that separately. There is no box or instruction manual. This is a used item, but thank you for your understanding.