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-2 Heating Unit: Complete with 2 Oversize 15" x 24" (37cm x 60cm), 3 Standard 10" x 12" (25cm x 30cm) and 1 Neck Contour 24" (60 cm long) HotPacs. A smaller, non-insulated heating unit with the capacity for Oversize HotPacs. Hydrocollator Heating Units feature: • Includes two Oversize, one Neck Contour and three Standard Size HotPacs. Supplied ready for immediate use and requiring no special plumbing • 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.