1.The channel cable bridge/Cable Tray is a kind of fully closed bridge.It applies to computer cables,telecommunication cables,thermocouple cables and other highly sensitive system control cables.It can effectively control cable shielding interference and protects the cable well in heavy corrosion environment 2.surface treatment: galvanized or powder coated 3.low price high quality welcome to order. 4.We can also provide you the custome products