this wppo deluxe pizza oven features a red powder-coated steel oven exterior with 430-grade, double-walled stainless steel interior. A unique downdraft air system provides improved temperature management. The wppo pro 4 has a 483 square-inch cooking surface with over 4 inches of fire blanket insulation in the dome and 2 inches below the oven floor. A thermometer built into the oven door allows you to check internal temperatures without letting heat escape . The deluxe pizza oven cart features a bottom storage shelf, side handle, and wheels for easy placement.