The Zimmermann Brake Kit - Rear - 138398 is a comprehensive kit of products designed for use on a car's rear brakes. It includes three different components, each designed to work together to provide efficient and effective braking performance. The contents of the kit may vary depending on the specific make and model of the car, but typically include a set of rear brake pads, rear brake rotors, and rear brake calipers. These components are essential for maintaining safe and reliable braking, as they work together to slow down and stop the vehicle. The kit may also include any necessary hardware or accessories for installation. Overall, the Zimmermann Brake Kit - Rear - 138398 is a convenient and all-inclusive solution for replacing or upgrading the rear brakes on a car.