Feature: Made from quality materials to ensure reliable performance and long service life. The windshield washer cap would prevent the fluid from leaking out and keep the dirt out of the open filler spout. To replace your lost, cracked or failed due to heat windshield wiper washer cap Designed to match the fit and function of the original cap on specified vehicle The cap is found on top of a plastic bottle in the windshield washer fluid reservoir, at the back near the windscreen wipers or under the hood. OE Number: 25731418 This is a non-OEM product, acceory only! Specification: Material:Plastic Color:Black Inner Hole Diameter:5.1cm/2" Size:17.9x6.3cm/7.05"x2.48"(L*W) Fit for: for Buick Century 1987-2005 for Buick Electra 1985-1990 for Buick Enclave 2008-2016 for Buick LaCroe 2005-2009 for Buick LeSabre 1992-2005 for Buick Lucerne 2006-2011 for Buick Rainier 2004-2007 for Buick Regal 1988-2004 for Buick Rendezvous 2002-2007 for Buick Riviera 1988-1999 for Buick Roadmaster 1991-1996 for Buick Skylark 1984-1998 for Buick Terraza 2005-2007 for Cadillac Allante 1987-1988 for Cadillac CTS 2003-2007 for Cadillac DeVille 1994-2005 for Cadillac DTS 2006-2011 for Cadillac Eldorado 1992-2002 for Cadillac Escalade 1999-2014 for Cadillac Fleetwood 1993-1996 for Cadillac Seville 1992-2004 for Cadillac SRX 2004-2009 for Cadillac STS 2005-2011 for Cadillac XLR 2004-2009 for Chevy Astro 1985-2005 for Chevy Avalanche 1500/2500 2002-2006 Package Includes: 1 pcs Windshield Washer Fluid Reservoir Cap