DB/JB Combustion Fan Assembly Gasket for the Daniel Boone and Jim Bowie Green Mountain Grills. This is a high-quality Silicon Gasket serves as a drop-in replacement for DB/JB Combustion Fan Assembly Gasket if it has become damaged or failed. The Fan Assembly Gasket goes in between the body of the and the Combustion Fan to keep smoke and air from escaping from the grill causing soot issues. Preventive maintenance is key to keeping your Green Mountain Grill running smoothly and happy. If you find any troubles with your Fan Assembly Gasket this is the part you need to replace! Green Mountain Grills only sells 100% genuine parts.