Weber part 81335 - 3/8" x 12-3/4" Crossover Tube Weber part # 81335 - 3/8" x 12-3/4" Crossover Tube for Genesis gas grills. Fits Weber Genesis S310 S320 E320 grills WITH SIDE CONTROLS This is the crossover tube included in Weber's burner set # 67820 Please visit Weber's website at http://help.weber.com/schematics/#serial-number to ensure you order the correct parts for the specific year of your grill model. Parts can appear to be identical but not fit certain year models. It is best to look up by serial number. The link will also help you find the alpha-numeric serial number.