This genuine Weber replacement crossover tube is for use with the Genesis Silver A model grill (Weber grill models with 2 main cooking burners). Measures 10.5" long. Weber replacement part #83738.
This Weber Crossover Tube is required to ignite the back burner on a two burner grill.
That said, mine had decayed with the burners still in like new condition. Short of replacing everything I purchased and replaced this tube and all is well again. The part is OEM or an perfect copy.
Note: To extend the life of this tube, install it with the flame ports facing to the center of the grill, mine was pointing up and soon filled with food and carbon and rotted away.