Fuel filter made by MTU Friedrichshafen under their ValueSpares / ValueCare line. Details from the label: • Part number: 0020921901 • Type: Fuel filter (spin-on style) • Made in: Germany • Typically used on MTU diesel engines (marine, industrial, or generator applications) Used for: It removes contaminants (dirt, water, debris) from diesel fuel before it reaches the engine—important for protecting injectors and maintaining performance.