High Quality,Long service lifeHigh Strength ToughnessCorrosion resistanceGood electrical insulationHigh temperature resistanceHow to use it:1. First choose the right size tubes, as it is 2:1 heat shrink ratio, and will shrink up to 1/2 of diameter.2. Wrap the cable wire with the tube, then use a heat gun heating until the wire was wrapped tightly.3. Dont Press the tube until it becomes cool.Specification:Heat shrink ratio: 2:1Operating Temperature: -55 Celsius to + 125 CelsiusMinimum Shrinkage Temp: 70 CelsiusFull Shrinkage Temp: 110Celsius maximumDielectric strength: 15 kV / mmFlammability: Flame RetardantColour:BlackMaterial:PolyolefinPackage Contents:2x Total 625Pcs(8 Sizes) Heat Shrink Tubing300x 1.57inch lengths 1/24inch240x 1.57inch lengths 1/12inch200x 1.57inch lengths 1/8inch180x 1.57inch lengths 1/6inch120x 1.57inch lengths 1/5inch90x 1.57inch lengths 1/4inch60x 1.57inch lengths 5/16inch60x 1.57inch lengths 2/5inch2x Plastic BoxOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it