Weber 3870001 Genesis S-310 Natural Gas Grill, Stainless Steel 3-burner natural gas grill; 42,000 BTUs; 637 square inches total cooking area 507-square-inch primary cooking area; 130-square-inch warming rack 7mm diameter stainless steel rod cooking grates Crossover ignition system for adjusting burners individually 2 heavy-duty front locking casters and 2 heavy-duty back swivel casters