electric oil filled aluminum radiator die casting aluminum fins Double insulation heating element Class 2 Pilot wire Oil filled aluminum radiator, SF-500B new series1. From 5 fins to 13 fins, 600W to 2000W2. Wall mounted3. Adjustable thermostat(with pilot wire)4. Energy saving mode5. Everlasting heating transfer oil6. Double insulation heating tube7. Safety overheat cut out8. Class 2, IP24