The Baldwin 5-3/8" Spin-On Coolant Filter is designed to help maintain your diesel engine cooling system and add chemicals to the coolant itself to replenish important protectants that may be lost over time. It is designed for use in plain water or in up to 60 percent antifreeze solutions. The filter is equipped with a balanced treatment additive plus, a phosphate/molybdate/nitrite-based inhibitor used to protect the engine and enhance its performance. This filter is the perfect choice for your engine. FleetPride is your First Click in Heavy Duty®.