Product Details: OTR Heavy Duty Conventional Pre-Charged Antifreeze/Coolant 50/50 Premix ensures Expertise Built In™, being uniquely made with industry-leading additives to provide performance meeting or exceeding ASTM heavy duty requirements. This heavy duty antifreeze/coolant also boasts nitrites for optimal wet sleeve liner cavitation preservation. FleetPride is your First Click in Heavy Duty®.