... of its own factory and cost-effective SpecificationsThe Network open Rack is light,colid and durable ,antirust,easy to ... of its own factory and cost-effective.Network open Rack:1.Assembly structure,1 package for 1 set.2 ... can be installed on both side of the rack for more cables.5.Pollution-free materials is ... rolled steel.Surface FinishDegreasing, rustproof, Phosphoric Spraying. open rack,42U,OEM