Six models available (20 to 70 cu. Ft.) utilizing environmentally safe R-134a refrigerant. 3" non-CFC polyurethane foam insulation. Self closing hinged doors each having a cylinder lock. Units have adjustable 6" legs and heavy duty epoxy coated shelves *(wheels shown are an optional accessory). All units have an external digital thermometer and adjustable temperature control, range -22° to -12°C, factory preset at -20°C, front of units is stainless steel. Automatic electric defrost and interior lighting. 110V, 60Hz, 1 phase.