DAMP-SHRINK Dual Wall Adhesive Lined Thin Wall Heat Shrink, 0.250 Inch (6.4 mm) Diameter, 0.080 Inch (2.0 mm) Maximum Recovered Inside Diameter, 48 Inch Lengths, 25 pieces, Black. For damp locations, Flexible tubing with an adhesive inner wall which seals and protects components from moisture and corrosion. For use where an environmental seal is needed, protecting components such as a connector to cable transitions. Shrink Ratio is 3 to 1. Temperature Range is -67 degrees Fahrenheit to 230 degrees Fahrenheit (-55 degrees Celsius to 110 degrees Celsius). Voltage is 600 Volts. Flammability is Outer wall flame retardant UL (VW-1) Recognized, Military Specification AMS-DTL-23053/4 Class 3. (material performance only).