The Pure Blue H2O 3-Stage RO Replacement Filter 3-Pack is designed specifically for the Pure Blue H2O 1:1 RO System, ensuring compatibility and optimal performance. With a 3-stage filtration method including reverse osmosis, carbon block, and sediment, this filter effectively removes contaminants to provide clean and safe water for household use. Made of high-quality materials like polypropylene, carbon, and plastic, these filters have a capacity of approximately 6-12 months per filter, depending on water usage and quality. The set includes 3 filters, each measuring 2.5 inches in depth, 14 inches in height, and 7 inches in width, making it a convenient and reliable choice for maintaining your reverse osmosis water filtration system.