This is a NGK household water purifier C1 (CW-101). It was removed because the kitchen faucet was replaced with one that has an integrated water purifier. The cartridge was partially used, but it has been stored since removal, so please consider it a bonus. There are some scratches and signs of use. I have cleaned it as much as possible, but I ask for your understanding regarding water stains before purchasing. Operation has been confirmed. It will be sent with the cartridge. I will drain as much water as possible from the cartridge and take measures to prevent leaks during shipping.