KVK water purifier cartridge PZ871-3, set of 3, for high-performance water quality improvement. Genuine product from the manufacturer. One cartridge can be used for 4 months. Price: Purchased for 14,410 yen (tax included). - Model: PZ871-3 - Brand: KVK - Quantity: Set of 3 - Phone number: 0120-277-995 - Website: www.kvk.co.jp I receive a set of 3 once a year, and I have a few extra, so I'm selling them. Although they are unused, please understand that they have been stored at home before purchasing. These are for water purifier faucets. If they fit your home, please consider purchasing them.