The OEM Mid 1970s-UP Chevrolet-GM Used/Recycled Crankshaft Triple Pulley 39721800E is a vintage part made by GM in the United States. This steel crank pulley features a painted finish and is designed for use with V-belt belts. It is not a performance part and is not universally fitting, making it a specific replacement for the Chevrolet-GM vehicles from the mid 1970s onwards. With the superseded part number 3972180, this triple pulley is a reliable and high-quality choice for car and truck owners looking to replace a worn-out or damaged part.