135 PCS Heat Shrink Tube Wrap Cable Sleeve Tubing Sets Assorted Cable Wire Wrap Electric Insulation Sleeve, Environmental protection Heat Shrinkable Tube A wide selection of sizes to fit over your project's needs. includes 8 specifications (135PCS ) Shrinkage Ratio:2:1 (will shrink to 1/2 its supplied diameter) Excellent flame retardant, environmental protection, insulation, soft, stable performance, low shrink temperature, quick shrinkage. Widely used in wires, solder joint protection, wire ends, wiring harness, electronics protection and insulated; metal products rust prevention, anti-corrosion treatment, wire labeling or color-coding, etc. Small diameter, short head, can be done with a lighter shrink; large diameter or long and large number of heat shrink tubing, can be done with hot hairdryer, heat gun shrink to make batch processing.