On-Demand Tankless Water Heater Door Retrofit Kit, 10-Gallon or largerFor 10-Gallon or larger water heater openingsRetrofits your original opening and door to adapt to the Atwood On-Demand Tankless water heatersIf you have a 6-Gallon water heater, use part 90255 to retrofit your doorIncludes:Retrofit KitPolar White Door