This product is a genuine Porsche A/C refrigerant hose designed for use in the rear of 911, Boxster, and Cayman models. The part number for this hose is 99157309203. It is specifically designed for use with the A/C system and is made from high-quality materials to ensure optimal performance and durability. This hose is an essential component for maintaining proper cooling and air conditioning in your Porsche vehicle.