MTX solid discs are constructed using one complete segment of Japanese SUS 420 stainless steel then heat-treated to HRC 36+-2. Lightening and drill hole patterns are as per OEM designs to improve braking performance and reduce the temperature of the disc.MTX Discs provide amazing braking control for your motorcycle. All MTX discs are designed and manufactured with world-leading cutting edge technologies:Precision CNC machined and laser-cut technologyJapanese SUS 420 Stainless SteelReplacement for Original EquipmentOEM Design; lightening & drill hole patternsSpecifications:O.D: 240mmI.D: 105mmMinimum Thickness: 4.5mmDisc Position: Rear Fits: Honda CB400 SF Super Four 1992-1999 CB400 SF Super Four V-Tec NC39 1999-2003 CB400 SUPER FOUR 2008-2012 CB400 SUPER FOUR ABS 2008-2011 CB900F HORNET 2002-2007