Zerostart 3100039 Engine Block Heater for Buick, Cadillac, Chevrolet, Ford, Lincoln, International by Navistar, Jeep, Mazda, 1-1/2-Inch Diameter | CSA Approved | 120 Volts | 600 Watts For Buick, Cadillac, Chevrolet, Ford, Lincoln, International by Navistar, Jeep, Mazda Ensure quick winter starts and reduce engine wear CSA Approved