Primo Ceramic Heat Deflector Plates For Oval JR. 200: Maximize the versatility and unique shape of your Primo Oval JR. 200 Grill using the ceramic heat reflector plates. The set 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.