Uriah Products UA734560 is four (4) feet of black flex tubing with a 1/2" inner diameter.  This flex tubing is made with polyethylene extrusion， corrugated for maximum flexibility and split along its length for easy management and protection of wires and cables from cuts， abrasions， and UV wear. Each tube can be cut to shorter lengths as needed， offering you versatility for organizing and protecting wires for your home entertainment systems， computer networks， under hood or trailer wiring and many other uses.