Zerostart 3500043 Engine Block Heater for Ford, Mercury, Lincoln, International, Caterpillar, Detroit Diesel, Hino, Mack, Nissan, 3/4" NPT Thread | CSA Approved | 120 Volts | 1000 Watts Ensure quick winter starts and reduce engine wear CSA Approved For Ford, Mercury, Lincoln, International, Caterpillar, Detroit Diesel, Hino, Mack, Nissan 120 Volts/1000 Watts Thread Size: 0.75in NPT