The STP Gas Treatment Fuel Intake System Cleaner comes in a pack of 12 5.25 fl oz bottles, making it a convenient and effective solution for keeping your fuel system clean. Made in the United States, this fuel injector cleaner is designed to help improve engine performance by removing buildup and ensuring optimal fuel efficiency. With a Prop 65 Warning for safety, this product is ideal for automotive maintenance and should be used regularly to keep your vehicle running smoothly.