Shrink-On Tubing Individual Cable Tubing: Tubing Type - Heat Shrink Tubing; Temperature Rating - -55 to 135 deg C (-67 to 275 deg F); Material - Polyolefin, Non-Lined; Shrink Ratio - 2-1; I.D. Expanded - 4.00 in (101.6 mm); I.D. Recovered - 2.00 in (50.8 mm); Color - Black; Length - 50.00 ft; Manufacturer Series - F-221