High capacity, factory-balanced, refrigeration system holds 33°F to 38°F (.5°C to 3.3°C) for best food preservation in extreme conditions. Stainless exterior and aluminum side walls & back with stainless steel floor and ceiling. “Low-E”, double pane thermal insulated glass. Three (3) Heavy-duty, chrome-plated, wire shelves per section. Positive seal self-closing doors with 120° stay open feature. Lifetime guaranteed door hinges. Lifetime guaranteed heavy-duty all metal working door handles. The entire cabinet structure and solid door are foamed-in-place using a high-density, polyurethane insulation that has zero ozone depletion potential (ODP) and zero global warming potential (GWP).