Hesheng also offers a wide range of components and fittings of cable trays. Height adjust coupler is one of the fittings. 2 Splices required per length of Cable Tray Runs, Ladder type Cable Tray Runs, Cable Trunking Runs. Made from mill steel, carbon steel, pre-galvanized steel, Hot dip Galvanized Steel, 304/316 Stainless steel. Splice Plate or connectors or couplers, these are fittings that are used to join two sections of cable tray to each other. There are three type of connectors: straight connectors, angle connectors and adjustable connector. Adjustable connector: it allows changes in elevation standard vertical fittings are not applicable and they include two types: Horizontal adjustable connector: it adapts to changes in direction in horizontal plane. Vertical adjustable connector: adapts to changes in direction in a vertical plane, H .S. Unistrut Channel is the original metal framing system featuring a unique weldless connection. H .S. Strut Channel management system eliminates welding and drilling, and is easily adjustable and reusable for infinite configurations.