3/8 Inch Slit Blue Wire Loom Tubing. Used to protect wires and cable from abrasion. Made from blue polyethylene and corrugated for extra strength and flexibility. 3/8 Inch inner diameter tubing with a full length slit to allow for wires to easily be inserted into the loom. Bright blue color provides for an attractive wire covering that can be used in automotive and other electrical applications. Blue wire loom can be secured using blue cable ties, or by using cable clamps. For easier insertion of your wires, you can use a wire loom insertion tool.