Weber #85661 7pc Burner Tube Set for a 4 burner Summit Grill Weber # 85661 (7pc) Factory Original Stainless Steel Burner Kit Burner Tube Kit includes (2) 41841, 41842, 41859 crossover tubes, (1) 41773 20-1/2" Smoker Tube Burner. (4) 20-1/2" X 7-1/8" Main Burners See Product Description for list of models they fit. Please visit Weber's website to ensure you order the correct parts for your specific grill. It is best to look up by serial #. The following link will also help you find the alpha numeric number. http://help.weber.com/schematics/#serial-number