This thing was designed to extend the hopper on the Pit Boss 340, 440, and 456 Pellet Grills.
Of similar quality to the smoker itself, this extension help set the grill to cook while you are away from home for a few hours without concern about running out of pellets.
1. Open the hopper lid on the smoker
2. Place the extension on top
3. Open the extension lid and fill in pellets