DAMP-SHRINK Dual Wall Adhesive Lined Thin Wall Heat Shrink, 0.125 Inch (3.2 mm) Diameter, 0.023 Inch (0.6 mm) Maximum Recovered Inside Diameter, 48 Inch Lengths, 25 pieces, Black. Material Type is Polyolefin Cross-Linked with adhesive. For damp locations, Semi-rigid tubing. Adhesive inner wall seals and protects components from moisture and corrosion, Provides a rugged seal against the elements. Shrink Ratio is 2.5 to 1 Minimum. Temperature Range is -67 degrees Fahrenheit to 230 degrees Fahrenheit (-55 degrees Celsius to 110 degrees Celsius). Voltage Rating is 600 Volts, UL Recognized, Military Specification is AMS-DTL-23053/4 Class 1 (material performance only).