The Zimmermann Brake Kit is a comprehensive set of products designed for the rear brakes of a car. It includes four separate components, each designed to improve the performance and functionality of the car's brakes. The kit contains a set of brake pads, which are essential for creating friction and slowing down the car. It also includes a set of rotors, which are the metal discs that the brake pads press against to stop the car. Additionally, the kit contains a set of calipers, which are responsible for squeezing the brake pads against the rotors. Finally, the kit includes a set of brake lines, which are essential for carrying brake fluid to the calipers and activating the brakes. Together, these components work to ensure safe and efficient braking for the rear wheels of a car.