The product is a National Bearings Differential Bearing Set with the manufacturer part number A-18 (also known as A18), designed for Chrysler and Dodge vehicles. Specifically, this bearing set is intended for use in the transmission and drivetrain systems of these vehicles. National Bearings is the brand known for producing this high-quality bearing set, ensuring durability and reliability for your vehicle's differential system. Whether you are replacing worn-out bearings or performing maintenance on your transmission, this National Bearings set is a suitable choice for Chrysler and Dodge vehicles.