12" extreme-duty H-Beam design for support, where support is needed most. • 3" Inside posts with 3/8" side plates help prevent side damage from accidental impact during extreme operation • Extra durable lower posts are fully welded giving them exceptional strength. This keeps the post higher off the ground preventing any damage in the case of a roll back. • Upper posts are fully seam-welded and are positioned to achieve maximum strength for the entire pusher. These upper posts also eliminate the need for costly channel rolls • Extreme-Duty wear shoes are made from abrasion resistant steel for far greater wear life than most of the competition • 1-1/2" x 10" Rubber compound cutting edge provides the right edge for all your needs.