PVC heat shrinkable sleeve has special function of shrinking when heated. It can shrink when heated above 98 C. It is easy to use. It has excellent flame retardant, environmental protection, insulation, softness, stable performance, low shrinkage temperature, fast shrinkage and other advantages. The product has good high temperature resistance and no secondary shrinkage. It can play the role of anti-counterfeiting and beautifying packaging, and can play the role of insulation, moisture-proof, anti-corrosion, dust-proof and other functions for the covered goods. Hence,it is widely used for the outer covering of tubular articles such as electrolytic capacitors, inductances, monomers of various rechargeable batteries, combined packaging, curtain rods, bath curtain rods, hanging rods, tow rods, broomsticks, tool rods, telescopic rods, garden tools, support rods, etc. It can also be used for the identification of copper bars, joints and wiring harnesses of low-voltage indoor buses, and insulation coating. High efficiency, low investment in equipment and low comprehensive cost. Packaging for lighting, LED pins, guitar and packaging bottle mouth