1、High‑quality nylon material, waterproof and electricity‑proof, non‑flammable and durable. 2、It will shrink when heated, and the internal solidified adhesive will melt to ensure tight wiring. 3、It shrinks quickly at low temperature, and it can be shrinked by using a lighter or heat gun. 4、High strength and toughness, it can still be bent arbitrarily after heat shrinking. 5、Total of 164pcs heat shrink tubes, there are many colors and sizes to meet the needs of daily use. 60 x 1.0x40mm Heat Shrink Tubing30 x 2.0x40mm Heat Shrink Tubing20 x 3.0x40mm Heat Shrink Tubing16 x 4.0x40mm Heat Shrink Tubing12 x 6.0x40mm Heat Shrink Tubing10 x 8.0x80mm Heat Shrink Tubing8 x 10.0x80mm Heat Shrink Tubing8 x 14.0x80mm Heat Shrink Tubing Item Type: Heat Shrink Tubing KitMaterial: NylonUses: Electronic components, circuit wiring harness, wire connection repair, data line (small head) repair, household goods line repairHeat Shrinkage Ratio: 2:1Include Size: 1.0 x 40mm/ 0.04 x 1.57in (yellow, black, red and green) 2.0 x 40mm/ 0.08 x 1.57in (yellow, black, red and green) 3.0 x 40mm/ 0.12 x 1.57in (yellow, black, red and green) 4.0 x 40mm/ 0.16 x 1.57in (yellow, black, red and green) 6.0 x 40mm/ 0.24 x x 1.57in (yellow, black, red and green) 8.0 x 80mm/ 0.31 x 3.15in (yellow, black, red and green) 10.0 x 80mm/ 0.39 x 3.15in (yellow, black, red and green) 14.0 x 80mm/ 0.55 x 3.15in (yellow, black, red and green)