The Zimmermann Brake Kit - Rear - 138400 is a comprehensive set of products designed for the maintenance and improvement of a car's braking system. It includes various components that are essential for the proper functioning of the rear brakes. The kit contains brake pads, rotors, and calipers, which are all crucial parts of the braking system. These components work together to provide efficient and safe braking performance for the vehicle.

The brake pads are made of durable materials that are designed to withstand high temperatures and friction. They are responsible for creating the necessary friction to slow down or stop the vehicle when the brakes are applied. The rotors, also known as brake discs, are the flat, circular metal discs that the brake pads press against to create the necessary friction. They are designed to dissipate heat and prevent the brakes from overheating.

The calipers are the hydraulic devices that push the brake pads against the rotors when the driver presses the brake pedal. They play a crucial role in the braking process by converting the pressure from the brake pedal into the necessary force to slow down or stop the vehicle.

Overall, the Zimmermann Brake Kit - Rear - 138400 is a complete package of essential components that work together to ensure the safety and performance of a car's braking system. It is designed to provide convenience and cost-effectiveness for car owners who want to maintain or upgrade their vehicle's brakes.