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 CBR400RR 1988-1994 CBR600F 1995-1998 CBR900RR FIREBLADE 1994-1997 RVF400 1994-1996 VFR400 NC24 1987-1989 VFR400 NC30 1990-1992 VFR400R (IMPORT NC30) 1989 1993 VFR750F RC36 1994-2002 VTR1000F FIRESTORM 1997-2005