Part Description: The Zerostart 3305040 1000 Watt 120 Volt circulation heater has 5/8? hose bead coolant connections. It features a coolant temperature regulating thermostat. It turns the heater on @ +80°F and off @ +100°F. There is a secondary automatic reset safety thermostat. It has a 5? Power cord with standard 120V 15A Plug. Includes mounting bracket, hardware, hose clamps and coolant adapter. Many other models available, see the Zerostart catalog for more options. | Circulation tank heaters provide dependable preheating for diesel & gas Agriculture equipment, Compressors, and Gen set engines in all temperatures by naturally circulating warmed coolant throughout the engine. | Features include: Rugged die cast, one-piece, aluminum construction, water resistant terminal end cap protects against harsh chemicals, flame retardant, permanently connected power cord. Designed for easy installation with bottom and top mounting options.