Photo 1 of Obeaming 12" x 18" RV Tank Heater Pad with Automatic Thermostat, DC 12V/13.5V Winterizing Tank Heater for Motorhome Camper Trailer, Fits 20-50 Gallon Fresh/Grey/Black Water Tanks (2Pcs)

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Photo 1 of Obeaming 12" x 18" RV Tank Heater Pad with Automatic Thermostat, DC 12V/13.5V Winterizing Tank Heater for Motorhome Camper Trailer, Fits 20-50 Gallon Fresh/Grey/Black Water Tanks (2Pcs)Photo 2 of Obeaming 12" x 18" RV Tank Heater Pad with Automatic Thermostat, DC 12V/13.5V Winterizing Tank Heater for Motorhome Camper Trailer, Fits 20-50 Gallon Fresh/Grey/Black Water Tanks (2Pcs)