Primo Heat Deflector Plates For The Oval XL.  Whether you're slow-roasting a turkey, baking chocolate chip cookies or smoking salmon, the new Primo ceramic Heat Deflector Plates will truly enrich your indirect cooking experience on a Primo grill and smoker. Set both d-shaped plates side-by-side on your Primo Drip Pan Racks (part # 333 sold separately) to transform the entire grill into an oven, smoker or roaster. Two per box..