Roller Grill Pizza Oven PZ 430D.The Roller Grill PZ 430 D Double Deck Pizza Oven is a high capacity professional pizza oven designed for authentic firestone baking. With two independent decks, each holding 2 16" pizzas, it can bake up to 4 pizzas simultaneously, making it perfect for busy pizzerias, restaurants, and catering operations. Each deck is equipped with a firestone base for crisp, traditional pizza crusts and independent top and bottom thermostats for precise heat control.