Features: 1. Corrosion Resistance 2. Good Electrical Insulation 3. High-strength Toughness 4. High Temperature Resistant 5. Waterproof Resistant 6. Long Service Life 7. CHOOSE THE RIGHT SIZE TUBE. Measure the diameter of wire/cable you want to wrap, make sure the diameter is equal to the size of heat shrink tube after shrinked, because the tube will shrink up to 1/3 of original diameter after heating. 8. WRAP THE WIRE WITH THE TUBE. Cut out the length you need, wrap the wire with the tube, use a lighter, hair dryer or heat gun to heat the tube. 9. HEAT THE TUBE UNTIL THE WIRE IS WRAPPED TIGHTLY.