Cage bases are the foundation of the cage to which back, front, and end sections are welded (in a jig) assuring the cage is square. Cage bases are made of 3" x 8" x 11 ga. with reinforcing inserts, (3/16" optional) material (fork tubes); five pieces of 2-1/2" x 2-1/2" x 3/16" angle iron for cross braces; and 1" x 3" tubing in the end sections of the base.