Weber 69787 18" Burner Tube Set fits up-front control Spirit 300 Series year 2013 and newer Weber Spirit 300 Series burner set, model years 2013 and newer (with "Up Front" controls). Left and right main burners measure 18" and the center main burner 17-3/4". Crossover is 15-1/4" long. Instructions included. 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