These durable stainless steel Heating Units house the Moist Heat HotPacs. The units are thermostatically controlled to ensure the ideal therapeutic temperature for HotPacs. Hydrocollator is one of the most popular heating units among several others and it is remains the benchmark heating unit against which all other units are judged. Most of the heating units are full fiberglass insulation to prevent heat loss. The stainless steel design of these heating units are very dependable and rugged. Most of the units are simple to fill with water and No plumbing required. These units maintain the constant temperature of HotPacs. When it comes to the bigger units like Mobile units, they are equipped with 8 cm swivel, rubber casters for friction free movement. Most of the units come with minimum One year warranty