Tranking is a set of enclosed enclosures, ducts, and components used for electrical wiring, computer networks, PBXs, and so on. The path and space created by the trunking keeps the cables tidy and protects the cables from physical damage. Trunking has replaced traditional wiring methods, methods that were inflexible, difficult to implement, and difficult to extend or modify. Trunking is one of the best options for implementing structured networks. The trunk is made of strong PVC and in some types it is ABS which is also resistant to fire and water.