Our NEW “Package Deal” 20” “Icon” Smoker. We’ve added a 2nd Thermometer to the door, Warming Tray to the top of Fire Box, Thermometer Cable Port to the left of door, Drop-In 20” Convection Plate & slightly lowered the Smokestack closer to grate level. The 20" Classic is the big brother to the 16" Classic and is one of our most popular smokers. The large 20" diameter pipe offers 300 more square inches of cooking capacity than the 16" version. Also, with the extra diameter, you have additional space to the top of your cooking chamber for taller food items.