With the assurance you are Ready for the Road Ahead , PHILLIPS & TEMRO ZeroStart 1” NPT 1500W 120V Freeze Plug Engine Block Heater ensures your engine runs smoothly and efficiently during the cold winter months while staving off engine wear. OEM form, fit, and fashioned, this heavy duty engine heater replacement is tested and used for individual engine applications. FleetPride is your First Click in Heavy Duty .