Royal Electrical Non-Metallic Tubing (ENT) can be installed in concrete slabs, interior walls of combustible and non-combustible buildings and direct burial applications. Royal ENT is available in 13mm - 50mm (1/2” - 2”) diameters, is certified to CSA C22.2 No. 227.1 and has an FT-4 Rating. We carry a complete line of injection moulded fittings to complement our Royal ENT™ products including adapters, connectors, couplings and slab boxes. Colour coded Ident-a-Box™ lids can be used to easily identify the application of the slab box before and after the concrete is poured.