Genuine OEM Ford Cylinder Block Plug Seal, part number 1211039. This seal is specifically designed to fit into the engine cylinder block to create a watertight or oil-tight seal around a plug or fitting. Its function is to prevent the leakage of essential engine fluids. The part weighs 0.01 kg and is manufactured in Germany. Genuine OEM seals are made from durable rubber compounds engineered to maintain their sealing properties under extreme engine temperatures and pressures.