The Corteco Valve Stem Seal Set - 19035767 is a set of rubber seals designed to fit onto the valve stems of an engine. These seals help to prevent oil from leaking out of the engine and also help to maintain proper compression within the engine cylinders. This set includes multiple seals, allowing for replacement of all the valve stem seals in an engine. The seals are made by Corteco, a trusted manufacturer of automotive parts. This product is commonly used in engine maintenance and repair.