"The cooking surface on the Specialty Double Propane Burner measures 14 x 28.75."
About 14" limit on kettles.
"This triple propane burner has three 16 x 16 inch cooking surfaces."
16" limit on kettles.
Not too bad of a price though. If it came with a pilot system, I'd almost get one to use for parts for your one build. As is, *shrugs*.