seamless, welded is a poor boys way, its so unorganized and wouldn't work all that great
you can get 12 tubes just like mine at speedymetals for 100 us dollars, or you can get 6 tubes for 50 dollars thats including shipping.
what you get for 50 bucks is 1 3 foot 3/4 OD tube and 1 3 foot 1 inch od tube. you cut them yourself, they're grad 304.
