Ultra Stack And Hang Bins Will Hang On Louvered Panels Or Rail Hanging Systems In A Wide Range Of Configurations Designed To Meet All Applications Needs. Hanging Systems Are Either: Wall Mounted, Table Top, Free Standing Or Mobile Units. Use The System Best Suited To Your Needs With Your Choice Of Bin. Systems Are Formed Of Heavy-Duty 16 Gauge Cold Rolled Steel And Have A Gray Baked-Enamel Finish Which Ensures Years Of Heavy-Duty Use.