This heat shrink tubing set is constructed from sturdy materials that are designed to withstand extended use. With excellent workmanship, no worry about deformation or breakage. This heat shrink tube is an ideal solution for repairing and insulating electrical components, comes in a variety of sizes to satisfy your specific needs. Features - ColorBlack - Material:Polyolefin - Size:8.50X1.30X1.30cm/3.34X0.51X0.51in - Size:8.00X1.00X1.00cm/3.14X0.39X0.39in - Size:8.00X0.70X0.70cm/3.14X0.28X0.28in - Size:4.00X0.50X0.50cm/1.57X0.20X0.20in - Size:4.00X0.35X0.35cm/1.57X0.14X0.14in - Size:4.00X0.25X0.25cm/1.57X0.10X0.10in - Size:4.00X0.20X0.20cm/1.57X0.08X0.08in - Temperature resistance: 125 degree centigrade. - Withstand Voltage: 0.6KV. -This heat shrink tubing is versatile and can be used for a variety of applications, including protecting wires, data lines, capacitors, and more. -The heat shrink tube can effectively prevents cables from breaking due to long-term use, extending their lifespan. -With insulation functions, suitable for protecting wire connections and good for both professional maintenance and DIY projects. -The heat shrink tubes can be easily trimmed to the desired length with scissors, making them much easier to use. -With a range of sizes available, these heat shrink tubes can be used both indoors and outdoors. Package list: 30 x heat sink tubes(2mmx40mm) 25 x heat sink tubes(2.5mmx40mm) 20 x heat sink tubes(3.5mmx40mm) 20 x heat sink tubes(5mmx40mm) 16 x heat sink tubes(7mmx80mm) 8 x heat sink tubes(10mmx80mm) 8 x heat sink tubes(13mmx85mm)