Hydronix ICF-10Q Inline Coconut Filter 2000 Gal, 2" OD X 10" Length, 1/4" Quick Connect Inline coconut GAC filter for a water filtration system 1/4" quick-connect connections Coconut shell carbon filter media with polypropylene outer shell 2,000 gallon service life (or one year) with a 0.5 gpm flow rate Meets NSF Standard 42 certification for quality assurance