FORD MUSTANGyear vehicle attributes Quantity position part description1999 12000 12001 12002 12003 Base 12003 GT 12003 Mach 1 12004 Base 12004 GT 12004 Mach 1Package Contents: Fuel Tank Filler Neck GrommetPackage Quantity: 1Packaging Type: BoxSeal Inside Diameter (in): 1.3 inSeal Material: RubberSeal Outside Diameter (in): 2.5 inSeal Thickness (in): 0.9 In