The Seafoam HM16 High Mileage Fuel Injector Cleaner is a fuel additive designed to clean and improve the performance of fuel injectors in vehicles. Made in the United States, this 16oz pack of 6 bottles contains a total of 48oz of cleaner. The Seafoam brand is known for its quality automotive products, making this fuel cleaner a reliable choice for maintaining the fuel system of your vehicle.