This is a high-grade water purifier cartridge with two CPC5Z disinfectant filters, replaceable every 3 months. - Quantity: 2 pieces - Model: CPC5Z - Filter Type: Disinfectant Filter - Usage Period: 3-month cartridge - Grade: HIGH GRADE - Condition: Unused Although it is a new, unused item, please note that the box may be slightly deteriorated due to long-term storage. Available for immediate purchase.