Designed using the highest quality materials and components to provide the user with colder product temperatures, lower utility costs, and exceptional food safety. Factory-engineered, self-contained, capillary tube system using environmentally friendly R290 hydrocarbon refrigerant that has zero (0) ozone depletion potential (ODP), & three (3) global warming potential (GWP). 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 steel exterior and interior. “Low-E”, double pane thermal insulated glass. Equipped with one (1) factory-installed interior kit option. Four (4) different interior kits are available (see Kit Options). 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 is foamed-in-place using a high-density, polyurethane insulation that has zero ozone depletion potential (ODP) and zero global warming potential (GWP).