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: 300mmI.D: 127mmMinimum Thickness: 3.5mmDisc Position: Front Left Fits: KTM 400 EGS 1997 400 EGSE 1996-1998 620 EGS 1996-1998 640 LC4 1998-2000 640 LC4 ENDURO 2007 640 LC4-E ENDURO 2003-2005 640 LC4-E SUPER MOTO 1999