The product is a set of (5) 12oz bottles of Bardahl Synthetic Power Steering Fluid and MTS Cleaner. This product fits various European and Asian vehicles and is a direct replacement for the original power steering fluid. It has a volume of 1 gallon, making it convenient for use. The manufacturer part number is 57154-94100, ensuring compatibility with specific vehicle models. With its high-quality synthetic formula and stop leak capabilities, this Bardahl product is designed to keep your power steering system running smoothly.