The product is a genuine OE auxiliary belt tensioner designed for use in Volkswagen, Audi, Skoda, and Seat vehicles with 1.6, 1.8, and 2.0 engines. The tensioner is manufactured by VW and has a part number of 06A 903 315 E. It also has a reference OE/OEM number of 06A 903 315 F. This high-quality component is essential for maintaining the proper tension on the auxiliary belt, ensuring optimal engine performance and durability.