Features: brand new and high quality Easy to use, you can use a lighter or hair dryer to shrink the shrink tube. Fast heat shrinkage and strong insulation. Good insulation, flame-retardant and anti-corrosion. Protect the wires and prevent leakage of electricity. The wire sleeve tubing has a wide application, suitable for electrical insulation, cable bonding, and repairing wires, cables, pipes and electrical and electronic components and more. Specifications: Material: Plastic Colour: Black Shrinkage Rate: 2:1 (will Shrink to 1/2 of Its Conveying Diameter) Minimum Shrink Temperature: + 70°c Full Shrinkage Temperature: Up to +110°c Operating Temperature: -55°c to +125°c Tensile Strength: 10.4 Mpa Withstand Voltage: 15 KV/MM Flammability: Flame Retardant Package Includes: 30Pcs 2x40mm/0.08x1.57inch 25Pcs 2.5x40mm/0.1x1.57inch 20Pcs 3.5x40mm/0.14x1.57inch 20Pcs 5x40mm/0.2x1.57inch 16Pcs 7x80mm/0.28x3.15inch 8Pcs 10x80mm/0.39x3.15inch 8Pcs 13x85mm/0.51x3.35inch note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.