The Zimmermann Brake Kit is a comprehensive set of products designed for the front and rear brakes of a car. It includes six different components, all of which are essential for maintaining and improving the performance of a vehicle's braking system. The contents of the kit are as follows:

1. Front brake pads - These are the components that come into contact with the brake rotors to create friction and slow down the car.

2. Rear brake pads - Similar to the front brake pads, these are designed specifically for the rear brakes of the car.

3. Front brake rotors - These are the discs that the brake pads press against to create friction and stop the car.

4. Rear brake rotors - Similar to the front rotors, these discs are designed for the rear brakes of the car.

5. Brake pad wear sensors - These sensors are used to monitor the thickness of the brake pads and alert the driver when they need to be replaced.

6. Brake pad retaining pins - These pins are used to secure the brake pads in place and prevent them from shifting or falling out of position.

Overall, the Zimmermann Brake Kit is a comprehensive set of products that covers both the front and rear brakes of a car. It is designed to provide all the necessary components for a complete brake service, ensuring optimal performance and safety while driving.