The NAX water purifier cartridge JF-53-T is ideal for improving water quality in your home. It comes in a set of 3 and is designed for long-term use. 【Users and Replacement Guide】 This cartridge is estimated to last approximately 4 months for a household of 1-2 people, about 3 months for 3-4 people, and about 2 months for households with 5 or more people. You can choose the appropriate option based on your water usage. 【High Water Purification Capacity】 The daily water purification capacity is 10L for 1-2 people, 13L for 3-4 people, and 20L for 5 or more people, catering to various needs. - Brand: INAX - Product Name: Water Purifier Cartridge - Model Number: JF-53-T - Quantity: 3 cartridges - Estimated Users: 1-2 people - Estimated Daily Usage: 10L - Replacement Guide: 4 months - Estimated Users: 3-4 people - Estimated Daily Usage: 13L - Replacement Guide: 3 months - Estimated Users: 5+ people - Estimated Daily Usage: 20L - Replacement Guide: 2 months Thank you for viewing.