Specification: Provide inner diameter: 1.0mm, 2.0mm, 3.0mm, 4.0mm, 6.0mm, 8.0mm, 10.0mm, 14.0mm Color: black, red, yellow, blue, green Material: polyolefin Shrinkage: 2:1 (maximum shrinkage to 1/2 of its supplied diameter) Operating temperature: -55°C to +125°C Minimum shrinkage temperature: +70°C Full shrinkage temperature: max. +110°C Tensile strength: 10.4Mpa Dielectric strength: 15 kV/mm Flame retardant: flame retardant Certification: UL Packaging: boxed Package Included: 328/530pcs heat shrink tube set 1. We maintain a high level of responsibility for our customers and are as responsive as possible to the needs of our guests. 2. If you have any questions about our products, please contact us in time, we will solve it for you immediately! 3. Due to the different display devices, the color of the products may have some discrepancies, hope you can understand. 4. Due to the different photo shooting angle, the actual shape and size of the product may not be consistent with the picture, please refer to the description of the product size, everything shall be subject to the physical object received. 5. Thank you for your purchase, we sincerely wish you happy every day.