Avoid counterfeit products by purchasing here (directly from the manufacturer), For use in any refrigerator produce drawer, Ethylene filters slow down the ripening process so produce stays fresh longer - replace filters every 6 months for ideal results, Simply place the starter kit inside the produce drawer and secure it to the side with the supplied adhesive (surface should be dry and clean). These filters can be used in any refrigerator produce drawer, Starter kit includes a filter housing, user manual, adhesive strips, time strip with status display, holder, and 2 ethylene filters. Both filters must be used at the same time