Wirefy Heat Shrink Tubing Kit 180 PCS - 3:1 Ratio Adhesive Lined, Wire Shrink Wrap Tubing - Industrial Heat-Shrink Tubing - Black - Shrink Wrap Tubing Trusted UL Certification

3:1 SHRINK RATIO - Recovers to 1/3 of its original diameter, and makes a tight seal. Eliminates the problem of 2:1 tubing not shrinking tight enough., GLUE INSIDE - When heat is applied, adhesive comes out and seals the connection, creating resistant and long-lasting insulation., VARIETY OF SIZES - We have included 7 most commonly used diameters ranging from 3/32" to 3/4". Shrink tubing is precut to 3.5 inches., EASY TO USE - Simply slide heat shrink tube over your connection point and apply heat. Professional connections made in seconds., DUAL WALL TUBING & TRUSTED UL CERTIFICATION - Outer wall provides abrasion resistance. Inner wall creates resistant seal and strain relief. Independently verified by UL for quality and safety, giving you confidence in every use.