This product is a Genuine BMW A/C Refrigerant Hose with part number 64539120003. It is a high-quality replacement hose for the air conditioning system in BMW vehicles. The hose is designed to transport refrigerant from the compressor to the condenser and back, ensuring efficient cooling of the vehicle's interior. It is made with durable materials to withstand high pressures and extreme temperatures. This A/C refrigerant hose is an essential component for maintaining the proper functioning of the air conditioning system in BMW vehicles.