The Oval Expanding A-MAZE-N Tube Smoker is a lightweight, durable, and portable smoke generator, that produces a great quality smoke for cold and hot smoking. It expands from 12 to 18 inches. The Oval Expanding A-MAZE-N Tube Smoker produces smoke for up to 4 hours in the 12″ position and 6 hours in the 18″ position while cold smoking or supplementing smoke @ 225°F and up, in your grill or smoker. A-MAZE-N DUST cannot be used with the A-MAZE-N EXPANDING TUBE SMOKER.