The product is a Standard Motor Products PS-127 Engine Oil Pressure Switch designed to control the oil pressure in an engine. Made in Mexico, this switch is a vital component for monitoring and maintaining proper oil pressure levels. It is interchangeable with various part numbers such as PS78, D1825A, and S369, ensuring compatibility with a range of vehicles. This Engine Oil Pressure Switch by Standard Motor Products is a reliable and essential part for ensuring the smooth operation of the engine.