These are carbon fiber-reinforced nylon plastic D parts (suspension arms) for the M-07 chassis. They exhibit stiffer flex characteristics compared to the standard plastic parts found in the standard kit. These suspension arms are ideal to use under high grip surfaces.  - M-07 Concept D Parts Sprues x2  - Carbon-fiber reinforced parts improve chassis rigidity, and performance on high-grip carpet and asphalt surfaces.  - Compatible with M-07 Concept chassis.