These are new distributor overstock items that weve received at a great deal, only a limited number of pairs available. They are made of a semi metallic compound. Guaranteed to fit the following models: 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Kawasaki KX100 Customer Service hours Monday - Friday 9 am - 5 pm.