Genuine OEM Volkswagen Adapter, part number 1K0612391S. This adapter facilitates the connection between two different parts or systems within the brake assembly. It is located at position 18 in the diagram. The adapter has dimensions of 0.14m length, 0.133m width, and 0.074m height, weighing 0.19 kg. Genuine OEM adapters ensure precise fitment and reliable connection, crucial for the integrity of the braking system.