Simple design, enhances your grilling, and meet all your outdoor cooking needs The height of the smoked stack caps can be adjusted via the threaded hole to adjust the air circulation Please ensuring the cap allows for air to escape Pellet grills smoked stack increases the circulation of air inside the smoker to heat food more evenly, adding more smoky flavor to the food High reliability and, simple and installation, saving time and effort Make of Stainless Steel, which is strong and wear resistant to ensuring long term and reliability, Manufacturer: XAGMODSHN