The Amsoil Antifreeze & Coolant 50/50 Premix is a high-quality product manufactured in the United States. This ethylene glycol-based antifreeze is pre-diluted, making it convenient for use in automotive systems. With a volume of 1 gallon, this pack contains 1 unit of antifreeze ready for mixing with water to create a 50/50 solution. AMSOIL is a trusted brand known for producing reliable automotive fluids and chemicals that ensure optimal performance and protection for your vehicle.