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: Yamaha MT07 2013-2016 MT07 TRACER 2018-2020 MT07HO 2018-2022 MT07LA 2016-2022