The Smokenator Prism was designed to add smoke to your gas grill. The 12 inch x 2.4 inch prism shaped tube is made of 304 perforated stainless steel for many years of use. Fill the tube with hardwood pellets and place on your grill for hot or cold smoking of food. Use the Prism as a gas grill smoker box to add smoke flavor to all your foods on your gas grill. A very versatile product that is a “must have” for any serious griller. Hardwood pellets sold separately.