Engine Heater for Winter Self Circulating Vertical Diesel Generator Coolant Pre Heating 1500W 230V.Feature: 1. DURABLE MATERIAL: The engine heater has been tested by vibration and impact, and adopt excellent ABS and aluminum alloy material for longer service life 2. WIDE APPLICABLE: Engine pre heater can greatly reduce heat loss and improve operation efficiency. Widely used in various engine coolant preheating 3. TEMPERATURE SETTING POINT: The thermostat regulate the coolant temperature between