Proheat Heavy Duty Fluid Reservoir Heater Model 80-12 80 Watts, 6.7 Amp, 12 Volts DC Ideal for Oil Pans up to 1 Gallon of Fluid (3.5 Litres) and up to 5 Gallons of Hydraulic Oil. This heater is designed for Hydraulic applications. Also for use on oil pans where 120v may not be available. 8 X 1.5 X .08"