BriskHeat GDPCS15 Drum Heater, 115V AC, 300 W, 0°F to 160°F, For 55 gal Plastic Drum, NEMA 5 15P 3ARC4 Opens with Key No Opens with Key No Good Slip Resistance 23 W sq in Drum Capacity 55 gal Type Electric Features Built in Electrically Grounded Powered By Electric Control Range 50 Degrees to 160 Degrees F For Use With Poly Drum Includes Nema 5 15 Plug Standards CSA Certified For Container Type Drums Operating Voltage 115V AC For Container Material Type Plastic Thermostat Temperature Maximum 160 Degrees F Operating Temperature Maximum 160 Degrees F Operating Temperature Minimum 50 Degrees F For Container Capacity 55 gal Thermostat Temperature Minimum 0 Degrees F Electrical Connection Type 5 15P Plug Environment Indoor they have built in thermostats and adjustable straps that allow them to set up quickly