This product is a genuine Porsche engine crankcase breather hose connector O-ring. It is designed to fit specific Porsche models and is made from high-quality materials for durability and performance. The O-ring helps to seal the connection between the breather hose and the engine, preventing any air or fluid leaks. It is an essential component for maintaining the proper functioning of the engine and should be replaced if damaged or worn out. This O-ring has the part number 99970715440 and is an authentic Porsche product.