Circulation Tank Heater is Available in 850W, 1000W, 1500W, and 2000W, 120V and 240V. This heater is thermostatically controlled 135 degrees-175 degrees. Moderate mechanical ability is required for installation. Uses versatile strap type mounting. Product Features:Available for all size enginesEquipped with check valveFits most liquid cooled enginesInstallations easier and simplerNew lower radiator hose connectors