WHAT’S IN THE KIT: 2x Rear Disc Brake Rotor 681790FZN. Brake Disc Specifications Brake Disc Type: Solid. Brake Disc Thickness [mm]: 18. Minimum thickness [mm]: 15. ENGINEERED FOR SUPERIOR PERFORMANCE: Our parts are manufactured to exceed OEM specifications, backed by IATF 16949 and ISO 9001 certifications for exceptional reliability and quality.