Features:The set includes 200 pcs black heat shrinking tube of different sizes.The heat shrinking tube has a maximum shrinking ratio of 2:1 at the temperature of +110.These heat shrinking tube has a large tensile strength,very durable.The dielectric strength of the tube is 15KV/mm that makes it is more safe to use.The heat shrinking tube can work normally between -55~125.Specification:Size:1mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mmShrinkage Ratio:2:1 ( Will Maximum Shrink To 1 / 2 of Its Supplied Diameter )Minimum Shrinkage Temp: +70Full Shrinkage Temp: +110Operating Temperature: -55 To + 125Tensile Strength: 10.4 MpaDielectric Strength: 15 Kv / MmFlammability: Flame RetardantSupplied Format ( Round or Flat ): Product is Supplied FlatCutting Method: Scissors or Sharped KnifePackage List: 200 x Heat Shrinking TubeNote:1. As different computers display colors differently, the color of the actual item may vary slightly from the above images.2. Please allow 1-3mm differs due to manual measurement..