Primo Ceramic Heat Deflector Plates For Oval XL: Maximize the versatility of your Primo Oval XL Grill using the ceramic heat deflector plates. The pair of D-shaped plates sit side by side on the Primo Drip Pan Racks (sold separately) to transform your entire Primo Grill into an oven or a low temperature smoker. These plates will enhance the indirect heating ability of your ceramic grill for the best slow roasted chicken, smoked fish, or baked chocolate chip cookies.