The Genuine Porsche Disc Brake Pad Kit - 474447 is a comprehensive set of products designed specifically for use in a car's disc brake system. It includes three essential components: brake pads, brake rotors, and brake calipers. The brake pads are the friction materials that come into contact with the brake rotors to slow down or stop the vehicle. The brake rotors are the metal discs that the brake pads press against to create friction. The brake calipers are the devices that hold the brake pads and apply pressure to them to engage the brakes. This kit is designed to ensure optimal performance and safety for your car's braking system.