Thank you for viewing. This is a water purifier cartridge that removes 19 substances and can be used for approximately 6 months. 【Product Details】 ・Model: TK-CJ23C1 ・Compatible models: TK-CJ23 / TK-CJ12 / TK-CJ11 / TK-CJ01 / TK-AJ11 / TK-AJ01 ・Usage period: Approximately 6 months ・Material: ABS resin Please purchase only if you understand that this item has been stored at home. ※Price reduction is not possible for the purchase of only one item. ※Discounts are negotiable for purchases of 2 or more items. ☺️ If you wish to purchase multiple items, I will create a dedicated page, so please feel free to comment. Thank you very much.