Newlec Deep Slotted Back to Back Channel Support System is an ideal solution whenever there is a need to install cable tray, cable ladder, lighting, piping, ducting and many other building services. Includes all of the most popular channels (plain and slotted), brackets, spring nuts and other fastenings. Pre-galvanised finish of structural steel to BS EN 10346: 2009. Bracketry to BS EN 10111, BS EN 10025 and hot dipped galvanised to BS EN ISO 1461.