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 wave discs are engineered and designed to give your ride a great look without compromising your safety. The gentle wave design limits uneven wear that can cause pulsating resulting in premature replacement. Some motorcycles OEM discs are wave designs while we have others that are designed as an alternative upgrade to OEM solid discs.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: 220mmI.D: 100mmMinimum Thickness: 4.5mmDisc Position: Rear Fits: Kawasaki ER6F 650 2006-2013 ER6N 2006-2015 KLE650 VERSYS 2007-2014 NINJA 650L 2021 NINJA 650L SE 2021 NINJA 650R 2008-2019 NINJA EX650C 2008-2013 Z1000 2003-2006 Z750 2005-2006 ZX10R 2004-2010 ZX10R 30th ANNIVERSARY SPECIAL EDITION 2015 ZX6R 1998-2014 ZX6R NINJA (ZX600R) 2014 ZX6RR 2003-2006 ZX9R 1998-2003 ZZR600 2004-2007