re: Who can build one of these collapsible stainless tubing burners?

Not sure on pipe size. I no longer have this burner. Lost it. I would say the 3 small pipes are 3/4. Also, underneath them the gas tubing is shaped like a question mark and crimped closed on the end. Then 3 small holes are drilled under each of the 3/4 inch pipes. These holes are the jets. The 3/4 inch pipes are just to keep the flames compact and going straight up. Hope that makes sense.