Hope Wave Rotors. Features: Designed with a wider braking surface to make them more compatible with other brakes Standard rotors are laser cut from a sheet of custom steel for durability Floating rotors feature a custom steel braking surface riveted to an aluminum central carrier. Floating design compensates for thermal expansion with constant braking and self-centers to reduce drag Weight: 142g (180mm standard), 146g (180mm floating) Specs: Model:floating (2pc float) Size:200mm Color:red