2Cr13 Stainless Steel Solid or Floating Solid Solid or Floating (Factory):Solid Diameter (mm):227 Factory Diameter (mm):227 Factory Thickness (mm):4.5 PART NUMBER: MD6338D PART LOCATION: A107 Heat-treated carbon steel brake rotors Steel construction extends rotor and brake pad life by eliminating galling Rotors come with or without scraper holes (according to OEM rotor design)