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: Honda CB300R 2019-2022 CBF1000F 2006-2009 CBF1000F ABS 2006-2009 CBR250R 2011-2015 CBR250R ABS 2011-2014 CBR250R SPECIAL EDITION 2015 CBR300R 2015-2019 CBR300R/ABS SPECIAL EDITION 2015-2016