Even-Heat Distribution Offset Smoker Tuning Plates are designed to send the heat under the grill grates and distribute it evenly across the cook chamber. This is often useful when you have a cooker full of meat and require a more even temperature left to right. It also enables you to build a bigger fire. It has heat control and sends heat under the food instead of over it. These are mild steel and require a layer of cooking oil to prevent rust. You can also use them as a reverse flow plate for all Cactus Jack models that have this feature. 1 Plate packs are now available should you want to spec your own smoker. Instructions for Offset Smoker Tuning Plates Feed in from the right hand side, under the cooking grate shelves and set the plates up to stretch 3 quarters along the bottom of the smoker. Space the plates out accordingly to how you want your heat distributed. Dimensions 16'' Plate - 360mm x 145mm 20'' Plate - 450mm x 150mm