It's depends on the side broads. With 20" sides They should hold 350 bu n2 corn. Could get 700 bu on two setup that way, average fill accross scales at Elevator. Killbros Web says a 350's with 20" sides holds 300 bu. with 15" sides holds 270 bu. without sides holds 205 bu. When I fill 2-350's with 20" sides and 2-350's with 15" side. We endup with at least 1100 bu of corn on semi.