Insulated heated blanket ideal for 55 gallon drums. It allows you to maintain a certain temperature of liquids, so as not to lose viscosity. The temperature range is between 125 and 145 degrees. It can be used outdoors and should be cleaned daily. If you need to keep liquids like propane warm in cold weather, this will work. Cleaning in the warm season is not onerous. It folds down to about 4 inches. You don't have to stop work because of the cold. Keep liquids in your kegs at a constant temperature.