Keep your filtration system working at peak performance with this Frontier Max Replacement Filter Cartridge. It is designed for back country exploration, international travel and wherever water contamination is a risk. This Red-IV-120 water filter cartridge offers maximum protection against viruses, bacteria and cysts. You can use it with practically any hydration system thanks to its universal quick connector. Whether you have bottles, a gravity-fed design or hydration bladders, it can handle up to a 500ml/minute flow rate. The replacement cartridge for the Frontier Max system is designed to filter up to 120 gal. It is free of BPA, chemicals and iodine. It works to suppress the growth of harmful bacteria, algae, mold and mildew.