Features 1、Shrinks by heat, when the temperature reaches 100 degrees. 2、Made of high quality PE, the nonflammable tube can electricity. 3、The heat shrinkage ratio is 2:1, and the tube has high toughness, and can be bent casually after heat shrinking. 4、Allows for fast shrinkage at low temperature, and a lighter or a heat gun can used for heat shrinkage. 5、750‑piece set has many colors and sizes, which will meet all your need s for daily using. Specification Item Type: Heat Shrink Tubing Kit Product Material: PE Application: Electronic components, circuit wiring harness, wire connection repair, data line (small head) repair, household goods line repair. Heat Shrinkage Ratio: 2:1 Size Includes: Approx. 1.0 x 45mm / 0.04 x 1.77in Black 1.5 x 45mm / 0.1 x 1.8in Red 2.0 x 45mm / 0.1 x 1.8in Yellow 2.5 x 45mm / 0.1 x 1.8in Green 3.0 x 45mm / 0.1 x 1.8in Black 3.5 x 45mm / 0.1 x 1.8in Blue 4.0 x 45mm / 0.2 x 1.8in Red 5.0 x 45mm / 0.2 x 1.8in Blue 6.0 x 45mm / 0.2 x 1.8in Blue 7.0 x 45mm / 0.3 x 1.8in Red 10.0 x 45mm / 0.4 x 1.8in Black 13.0 x 45mm / 0.5 x 1.8in Black Package List 180 x 1.0x45mm Black 145 x 1.5x45mm Red 100 x 2.0x45mm Yellow 70 x 2.5x45mm Green 50 x 3.0x45mm Black 40 x 3.5x45mm Blue 40 x 4.0x45mm Red 30 x 5.0x45mm Blue 20 x 6.0x45mm Blue 25 x 7.0x45mm Red 25 x 10.0x45mm Black 25 x 13.0x45mm Black