Zerostart 3400017 Portable Electric Magnetic Heater - 200W 120V for Transmissions, Oil Pans & Small Engines | CSA Approved | Winter Engine Warm-Up & Cold Weather Protection

Purchased item to warm up the engine on my old Bobcat skid steer. Went and plugged in the heater and tried to place on bottom of engine and it would not stick! I assumed that it was cast iron but it must be cast aluminum. So, had to return item but the service from supplier was good.