The surface of the generator is mesh allowing better air circulation in the sawdust. Spiral shape which allows slow combustion, without flame, without external heat source and over a long duration of hours. Smoking spiral for smoker, ideal for cold smoking all kinds of foods such as salmon, sausages, duck breast, filet mignon, pork, chicken, etc... works in most of the barbecues. Easy to use, simply place the smoking sawdust in the spiral and light it with a blowtorch lighter, a tea light or a sawdust lighter (not supplied). Notes: make sure the sawdust is level and the top of the spiral is visible. Used with a variety of wood pellets such as Cherry, Hickory, Mesquite, APole, Pecan, Beech and more. With little sawdust, it can produce hours of smoke. Ideal for smoking fish, meat, cheese, vegetables and much more. Product description COLD SMOKE GENERATOR SET Nickel-plated with candle and wood powder Diameter 21 cm