Plastic provides outstanding insulation properties, which are crucial for electrical components. This product fits the 2008-2012 Escape, 2007-2017 Expedition, 2004-2014 F-150, 2008-2010 F-250/350/450/550 Super Duty, 2005-2009 Mustang, 2006-2008 Mark LT, 2008-2011 Mariner, and other models.