Hydro Logic Replacement Filter & Membrane Kit for Stealth-RO150This Kit contains replacement filters and membrane for the Hydro Logic Stealth RO150 Included in this kit: Choice between Stealth RO150 Standard Green Coconut Carbon Filter Stealth RO150 Upgraded KDF CAT Carbon Filter Stealth RO150 ChloraShield Carbon Filter Stealth RO150 Pleated Sediment Filter Stealth RO150 Membrane Stealth RO Green Coconut Carbon Filter Stealth RO: Replace after 1,250 gallons smallBoy: Replace after 3,000 gallons Rated at 1 GPM