The Gardner Bender 0.476 Cm. Heat Shrink Tubing (5-Pack) Provides Abrasion And Moisture Protection For Electrical Wire And Cable. This Tubing Is Constructed Of Flame-Retardant Polyolefin. Flame-Retardant Polyolefin Construction Resists Common Fluids And Solvents Repairs, Strengthens And Protects Cable Insulation To Ensure Strong Connections Ideal For General Purposes Uses Including Adding Perspiration-Resistant Grip To Tool And Sporting Handles Or Sealing Rope Ends Excellent Product To Repair Appliance, Extension Or Small Electronic Cords That Are Exposing Bare Wires 2:1 Shrink Ratio Means Tubing Shrinks To 1/2 It'S Id (Inner Diameter) Size Self-Extinguishing Tubing Will Not Drip, Crack Or Flow When Heated To Shrink Temperatures Maximum Operating Temperature: 135 Deg. C, Minimum Operating Temperature: -55 Deg. C Shrink Temperature: 248.88 Deg. C Post Shrink Diameter: 0.238 Cm Pre Shrink Diameter: 0.476 Cm