Designed using the highest quality materials and components to provide the user with colder product temperatures, lower utility costs, exceptional food safety and the best value in today's food service marketplace. "Low Profile" models are designed to slide easily under custom built countertops. 1- 1/2 " (39 mm) diameter dual swivel castors. 31- 7/8 " (810 mm) work surface height. Factory engineered, self-contained, capillary tube system using environmentally friendly R290 hydro carbon refrigerant that has zero (0) ozone depletion potential (ODP), & three (3) global warming potential (GWP).