Thereplacement filter set for the PureGen ERO-435, ERO-450, & RO4-35 Reverse Osmosis System consists of three filters:

(1)10 Micron Carbon Filter
(1)10 GAC Inline
(1) 5 Micron Sediment Cartridge

This set should be replaced once a year for best tasting water. The replacementmembrane is not included in this set as it only is changed every 3 years.