Freshness finds unmistakable expression in the Sub-Zero PRO 48. Born of 100% steel, it's the 800-pound monument to food preservation - equal parts sculpted metal design statement and culinary secret weapon. Its vast interior, like its bold exterior, is crafted of stainless steel, with removable steel storage trays. Sub-Zero pioneered dual refrigeration, a process that utilizes separate cooling systems for the refrigerator and freezer, delivering optimum conditions for each type of food. While the refrigerator is encapsulated in cool, moist air, preserving fresh foods, the freezer's air is dry and frigid, thereby preventing freezer burn. The PRO 48 has been enhanced with triple evaporators, a feature that permits storage conditions in the main refrigerator compartment and the refrigerator drawers to be adjusted separately. The PRO 48 is available with or without a glass door and may be built-in or freestanding. Its sculpted metal, dual refrigeration and advanced controls marry performance and design in a bold new way for home refrigeration. They not only keep foods magnificently fresh, they bring the whole kitchen tastefully up to date.