The E-2 Stationary Heating Unit is a benchmark against which all other heating units are judged is made of high quality stainless steel with thermostatically controlled temperature. Almost indefinite life ensures a constant supply of temperature-consistent HotPacs. It is durable and easy to maintain. It has smaller capacity, yet able to hold Oversize HotPacs. It includes two Oversize, one Neck Contour and three Standard Size HotPacs.