AllStar Performance Heating Pads, High temperature silicone heating pads externally preheat oil in wet sump oil pans, dry sump tanks and automatic transmission pans reducing overall warm up time and improving lubrication during initial start up. 3" cord, 120-volt operation. WARNING! Do not plug heater into electrical outlet without being installed on tank or metallic surface to absorb heat. Element heats up quickly and damage will result.