Sterling Bulk Bag Unloaders are available for manual operation as well as fully automated units incorporating electric hoists, bag massagers, flow control valves, and various methods of conveying material out of bulk bags. Custom systems and accessories are available to assist in the discharge to process for materials of all types. * 3" x 3" x 3/16" Uprights * 1" x 1" 14 Gauge Cross Bracing * Carbon Steel 2-piece Welded Construction