This product is a brand new and sealed rear wheel cylinder specifically designed for the VW Bay window bus model made between 8/1971 to 1979. It is manufactured by Forst and is a crucial component for the braking system of the vehicle. This high-quality brake wheel cylinder is perfect for maintaining the optimal braking performance of the rear axle on the VW Bay window bus, ensuring safe and reliable operation on the road. please study the photos as these are part of the description any questions please ask