The ideal deicer for 5 gallons of water – just drop in bucket and plug in! This virtually indestructible, cast-aluminum heating unit has fins for larger radiating surface. Keeps water from freezing down to -10° F. Bottom fins keep unit off of the bottom without welded wire supports or side clamps. Will not damage plastic or rubber buckets if operated without water. Unit will only heat to 220° F maximum when energized and out of water. Unit can be used as a submergible heater in water. Safe in plastic tanks. 250 watts, 120V. Measures 8" dia. x 2-1/2"H. 6-ft. cord has steel coil cord guard.