15’ Tube Assembly Kit, 4” OD, ALC w/ one 12-hole flange. 

* firing tube ( 1st tube from burrner ) for LTU80-130-30'  &  is replacement tubes for 15' tubes ( second tube body ) for LTU125-175-40' models

* For models LTU125-175 models,  accounts for both 15' replacement tubes.