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: 245mmI.D: 105mmMinimum Thickness: 4.5mmDisc Position: Rear Fits: Yamaha FZ1N FAZER 2006-2016 FZ1S FAZER 2007-2016 FZ6N 2004-2009 FZ6S FAZER 2009 MT03 2006-2012 XJ6N 2014-2017 XJ6NL 2014-2017