Sinking water tank heaters 1000 watt, 120 volts, 60 Hz. We have 2 new, one in box & one without the box. We put one together, threw out the box & then realized it's too small of wattage for our current horse water tank. These are safe for plastic tanks & is thermostatically controlled.
New price is $40 each, will sell both for 40 total. We always keep a heater on hand going into winter but didn't realize we got ones for the smaller tank we used to have, not our current 160 gallon tank.