Eighty-one quarts of insulated volume per box hold five 2.5 inch pans, three 4 inch pans or two 6 inch pans, and two boxes ship together so a hot service and a cold service travel separately. Insulation is 1.97 inches thick at a 40 filling density, which holds hot food at temperature for four to six hours and chilled food for three to five without any power supply. Front loading suits a service line, since pans slide straight in and out at waist height instead of being lifted over a top rim. Double buckles clamp the door shut so a full carrier can be tilted onto a trolley without the seal breaking. A groove moulded into the top lets one carrier stack squarely on another, keeping a two-box load stable in a van. Two external handles and high-strength wheels move the 33.4 pound pair between kitchen, vehicle and venue. Each box measures 25.59 by 17.72 by 27.17 inches.