The Elring Porsche Engine Oil Drain Plug Gasket - 128503 is a small, circular gasket designed specifically for use on Porsche engines. It is used to create a tight seal between the oil drain plug and the engine block, preventing oil leaks and ensuring proper lubrication of the engine. This gasket is made of high-quality materials and is designed to withstand the high temperatures and pressures of engine operation. It is an essential component for maintaining the performance and longevity of your Porsche engine.