The Genuine Porsche A/C Line O-Ring - 95557374903 is a replacement part for the air conditioning system in Porsche vehicles. This O-ring is specifically designed for use in the A/C line and helps to create a tight seal to prevent leaks. It is made from high-quality materials and is an authentic Porsche product. This O-ring is essential for maintaining the proper functioning of the A/C system and ensuring cool air is circulated throughout the vehicle's interior.