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: 280mmI.D: 130mmMinimum Thickness: 4.5mmDisc Position: Front Fits: Kawasaki GPZ1000 RX 1986-1988 GPZ1100 UNI TRACK 1983-1985 GPZ750 TURBO 1984-1985 GPZ750 UNITRACK 1985-1987 GPZ900R Ninja 1984-1989 Z750H LTD 1983 Z900 ELIMINATOR 1987-1988 ZL1000 1988