Brand New Rubber O-Ring Seal Fuel Pump Tank Gasket Allows Replacement of a Damaged or Failed Fuel Pump Gasket Includes:1 Fuel Sender O-Ring Gasket, Outside Diameter: 3.93 in, Inside Diameter: 3.48 in ( Flange Style O-Ring Seal) Compatible With Select 2000-2005 Buick Models Compatible With Select 1999-2000 Cadillac Models Compatible With Select 1997-2005 Chevrolet Models Compatible With Select 1997-2005 GMC Models Compatible With Select 2003-2003 Hummer Models Compatible With Select 1999-2004 Oldsmobile Models Compatible With Select 2001-2004 Pontiac Models See Compatibility Chart To Verify Your Specific Vehicle Year, Make, & Model Replaces 15034832