MTX floating discs are made from two segments of stainless steel which are riveted together to allow the outer section of stainless steel to expand under extreme temperatures. The outer section is manufactured from Japanese SUS 420 stainless steel then heat-treated to HRC 36+-2 while the centre of the disc is manufactured from steel or alloy. Fits: Kawasaki ER6F 650 2006-2013 ER6F ABS 2014-2016 Z1000 2007-2010 Z1000 ABS 2010-2012 ZX10R 2004-2007 ZX6R 2005-2012