These door sills are 100% carbon fiber in the correct weave that Ferrari uses. These are not overlays on the factory parts but true carbon fiber pieces. The parts are 4 layers of aero grade carbon fiber in either 1x1 plain weave and are made in the USA! The parts also have a UV protected clear gel coat and three coats of automotive PPG 2021 high solids clear. They are then hand sanded and buffed. Includes a right and left sill.