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 - 0.25 in (6.3 mm); I.D. Recovered - 0.12 in (3.0 mm); Color - Black; Additional Information - Wall Thickness 0.025 in; Manufacturer Series - FIT-221