The 1/2" solid steel shaft supports, plus the bottom support, result in a tub height of 16" above the ground. The poly tub insert is easy to clean and will save on feed loss. Lower head opening is 7" x 8". Unit comes in three steel sections that pin together. Overall dimensions 36" tall by 32" diameter. 12 feed openings, 36" tall, 32" diameter, 16" high tub, 9"deep tub.