Cord is heavy duty with good cold weather characteristics and good chemical resistance.
Image shows Frost Fighter version. The Flagro version will hill have different cord and cord end. Twist-lock connector for Flagro and NEMA 5-15P for Frost Fighter. To use these the power switch on the heater will be moved to the down position. Much older Flagro heaters may require a different connector. These can save lots of fuel since the heater will shut off when the area to be heated reaches the set temperature and doesn’t come back one until the temperature falls 3 degrees below your set temperature. Waterproof NEMA 4x thermostat.