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: 250mmI.D: 84mmMinimum Thickness: 5.5mmDisc Position: Rear Fits: Suzuki GS500 1989-2008 GS500E 2009-2012 GS500F 2004-2014 GSF250 BANDIT 1990-1995 GSF250 BANDIT (IMPORT) 1991-1993 GSF400 BANDIT 1991-1997 GSX250 INVADER 2002-2004 GSX250F ACROSS 1990-1998 GSX600F KATANA 1988-1997 GSX750F 1989-1997