Water purifier cartridge, Rainbow Seasons, a Co-op original. I no longer need it, so I hope someone who does can use it. Shipping is by regular mail only: 450 yen. Price is not negotiable. I have other items for sale, so please take a look if you'd like. Please read the profile section before purchasing. This item has been handled by a person once, so please consider this and bid carefully if you understand. No claims or returns, please.