Aquamira Frontier Max: Multi-Function Filtration System - RED Series IV Maximum protection RED Line Virus Filter with up to 500ml/minute flow rate Miraguard Antimicrobial* Technology suppresses the growth of bacteria, algae, fungus, mold and mildew within the filter media Multi-function system adapts for use with bottles, hydration bladders, gravity-fed and DIY systems Filters 120 gallons BPA free, chemical free, and iodine free