DRY-SHRINK Thin Wall Polyvinyl Chloride (PVC) Heat Shrink, 1.80 Inch (45.7 mm) Minimum Expanded Inside Diameter, 1.00 Inch (25.4 mm) Maximum Recovered Inside Diameter, 9.50 Inch (241.3 mm) Length, Clear. Low shrink temperature (store below 90 degrees Fahrenheit) to speed installation, Crystal clear material ensures easy to read labels and splice inspections, Highly flame retardant product manufactured from a material that is rated UL224 VW-1, Shrink ratio of 2 to 1 insulates a wide range of diameters and irregular shapes. Voltage is 600 Volts. UL Recognized. CSA Certified. Military Specification AMS-DTL-23053/2 Class 2.