Product DescriptionAQUACREST WF03-F1 Replacement Under Sink Water FilterCompatible with the Following ModelF-1000, F-2000, sub zero water filter 4204490, 4290510, F-1000S, and F-2000S Water Filtration SystemsAfter advanced upgrade, the model number is changed from AQU-F-1000 into AQU-WF03-F1.AQUACREST is an independent brand.This filter is not an original product.HighlightsReduces chlorine, sand, soil, rust, sediment and moreMaintains full water flow on your existing kitchen faucetExquisite design promises leak-free fitReasonable and integrate structure ensures high-quality performanceHigh-capacity filter cartridge performs for up to six months before replacementAdvanced Filtration MediaAQUACREST filter uses advanced filtration media to remove chlorine, sand, rust, sediment and bad taste in your tap water.The granular activated carbon block is made from natural coconut shells. Please confirm whether you are allergic to it.Good MatchDelicate design to fit the original brand. Easy for installation and operation, no tools required.Replace Your Filter RegularlyAn old filter can mean you’re drinking unfiltered tap water or even worse. Change your filter regularly as instructed in owner’s manual.Pure Water for Your Entire FamilyOffers pure water for multiple uses, giving enhanced protection to your family.