Primo Ceramic Heat Deflector Plates for Oval XL 400, Set of 2 is a great addition to your Primo grill. Absorb and deflect the direct heat of your firebox and turn your kamado grill into a low temperature smoker. You can also slow roast chicken, fish, or bake with the (2) piece heavy duty heat deflector set--made specifically for the Primo XL. A versatile accessory--great for the BBQ enthusiast looking to expand their cooking potential.