1190 Magnetic Engine Heater, 1190X 300W Magnetic Engine Block Heater Fit for Various Vehicle Types Including Trucks,Tractors

Zerostart 8605556 Heavy Duty Engine Block Immersion Heater for Caterpillar, Detroit Diesel, International/Navistar and Perkins Engines, 1" NPT Thread | 120 Volts | 1500 Watts

Zerostart 3400063 3.5 x 4.25 Silicone Pad Engine Oil, Transmission, Reservoir and Hydraulic Fluid Heater, 3½" x 4½" | 120 Volts | 250 Watts

Zerostart 3100003 Engine Block Immersion Heater for Eagle, Jaguar, Jeep, Renault, Rover, Kubota, Massey, Perkins, Yanmar, 1" NPT Thread Brass Adapter | CSA Approved | 120 Volts | 400 Watts

Kat's 30115 750 Watt 3/4" NPT Frost Plug Heater

Kat's 11419 400 Watt 28mm Frost Plug Heater