Features 1、[HIGH PERFORMANCE] These heat shrink tubings are made of polyolefin, with a shrink ratio of 2:1, to achieve electrical isolation, and have good insulation and flame retardant properties. 2、[WIDE APPLICATION] With compact design and wear resistance, it can be used for solder joint protection, broken wires connection, LED filament repair, etc. 3、[MULTIPLE SIZES] Electrical wire wrap assortment, including 12 sizes and 5 colors, with fine processing and standard size, suitable for different shrinkage needs. 4、[EASY OPERATION] Can use heat gun, lighter or hair dryer for heat shrinking, and these heat shrinkable tubes are pre cut and easy to operate. 5、[WITH STORAGE BOX] All insulation heat shrink tubes are stored in a storage box, with color and size marks on the cover, easy to access and carry. Specification Item Type: Heat Shrink Tubing Kit Material: PVC Shrinkage Ratio: 2:1 Color Size (Diameter x Length) Quantity Black 5.0x45mm 30PCS Black 4.0x45mm 50PCS Black 2.0x45mm 80PCS Black 10.0x45mm 20PCS Red 4.0x45mm 50PCS Red 8.0x45mm 20PCS Blue 2.0x45mm 80PCS Blue 10.0x45mm 20PCS Green 10.0x45mm 20PCS Green 3.0x45mm 60PCS Yellow 1.5x45mm 80PCS Yellow 6.0x45mm 20PCS Package List 530 x Heat Shrink Tubing 1 x Storage Box