Primo Large Oval Heat Deflector Plates - PG00326Deflector plates are the key to turning your Primo Large Oval into a true multi purpose cooker. By blocking and redirecting rising heat, these plates create the indirect cooking environment needed for low & slow barbecue, two zone grilling, and consistent top down convection. Most Common Uses Two Plates on Racks: Full indirect setup for long barbecue cooks. One Plate on a Rack: Creates direct and indirect zones for two zone grilling. Two Brand Options