The CUBE engine heater is Hot Products Engineering’s on-board heating unit. Featuring a high efficiency pump and thermostatic temperature control. The CUBE on board unit heats and circulates coolant through the engine’s cooling system. The 1.4lbs/.6kg system features an integrated pump, heating element and 135°F/53°C degree thermostat, power cord and zero-clearance chassis clamp for 30mm-33mm (not shown), hose clamps, manual and limited warranty.