When Used Together, The Tray And Trivet Roasting Pack Transforms Your Weber Q From Cooking In Grilling Mode To Oven Mode In Seconds. The Trays Are Engineered With Vents Designed To Circulate The Heat Above, Below And All Around The Food For Perfectly Even Cooking. Roasting Tray Creates Indirect Heat For Roasting Trivet Made From Durable Stainless Steel Trivet Raises Food For Heat Circulation And Even Cooking Fits Q 2800N Gas Grill