Gradient density provides optimum multi-depth layering of filter media specific for each applicationMaximum filtering for increased fuel filter, fuel pump and fuel system lifeNew strainer required to validate new fuel pump warrantyDeliver reliable filtration and are the line of defense against fuel system contaminantsLimited 1 Year WarrantyAirtex gradient density fuel pump strainers deliver reliable filtration and are the line of defense against fuel system contaminants. Free technical assistance is available at 800-424-7839.