Hydrocollator Heating Units remain the benchmark against which all others are judged. Durable and easy to maintain, these high quality stainless steel units provide a constant supply of temperature consistent HotPacs. Model E-1 Heating Unit: Non-insulated and smaller than E-2, the E-1 is just right for small clinics and departments where Oversize HotPacs are not a concern. Fits on desk top, counter top or mobile stand. Complete with 4 Standard Size HotPacs 10" x 12" (25cm x 30cm) Supplied ready for immediate use and requiring no special plumbing, Hydrocollator Heating Units feature: • Fiberglass insulation for reducing heat loss and maximizing energy efficiency (except for the E-1 and E-2 Heating Units). • Easy to maintain. Simple to fill and drain. No plumbing required. • 3" (7.5 cm) swivel-type rubber casters for silent, friction-free movement of mobile units. • UL listed, CSA certified.