1/8"-1/16" & 1/4"-1/8" x 4"L, Black, Heat Shrink Tubing, Assorted Sizes, Resists Common Fluids & Solvents, Meets UL 224, 125 Degrees Celsius, CSA C22.2 No. 198.1, 125 Degrees Celsius, Mil-Dtl-23053/5, Class 1 & 2, AMS 3636 & 3637, DEF STAN 59-79, Issue 3 Type 2A, Continuous Operating Temperature: -55 Degrees Celsius, -67 Degrees Fahrenheit, -135 Degrees Celsius, 275 Degrees Fahrenheit, Shrink Temperature: 120 Degrees Celsius, 250 Degrees Fahrenheit, -250 Degrees Celsius, 480 Degrees Fahrenheit, 600 V/Mil Dielectric Strength, 2:1 Shrink Ratio.