Product Details: The PHILLIPS & TEMRO ZeroStart® 1” NPT 1500W 120V Threaded Engine Block Heater keeps you Ready for the Road Ahead™, providing your semi truck with speedy winter starts, effectively providing direct heat to the engine coolant while staving off engine wear. OEM form, fit, and fashioned, this heavy duty engine heater replacement is tested and used for individual engine applications.<br/><br/>FleetPride is your First Click in Heavy Duty™.