Durable and high-quality Stainless steel construction and 3” (8 cm) swivel-type rubber casters for silent, friction-free movement 27-gallon tank capacity Extra-large tank, inside racks and oversize drain maximize capacity; reaches 160° F (70°C) in eight hours Thermostatically controlled temperature Full fiberglass insulation ensures minimum energy use and prevents heat loss for consistent, even heat; second thermostat guards against low water level and overheating Easy maintenance Simple to fill and drain and no plumbing required