Expandable smoke tube with easy slide extension, adjusts from 11" to 18". Once lit, the tube provides 3 - 5 hours of smoke. The GMG Expandable Smoke Tube is compatible with any gas, charcoal or pellet grill allowing you to add smoke flavor to any grill. Cold smoke cheese & nuts! Add extra smoke flavor to hot steaks, chicken, pork, and fish! Light easily with an inexpensive propane torch (not included).