Genuine OEM Volkswagen A/C Expansion Valve Seal, part number 7E5820139. This small but critical component creates a tight, leak-free seal for the air conditioning expansion valve, preventing refrigerant loss and maintaining system efficiency. Weighing approximately 0.054 kg, this genuine OEM seal is manufactured from specific materials to withstand the pressures and temperatures of the A/C system, ensuring long-term performance and preventing costly refrigerant leaks.