Product Name : Heat Shrinkable Tubing Heat shrinkable tube is made of high quality soft crosslinked polyolefin material, which has the advantages of insulation, corrosion resistance, wear resistance, low melting point, waterproofing, sealing and high adhesion. Specification: Material: Polyolefin Item Shape: RoundFlat Dielectric strength: 1kV Shrinkage Ratio: 2:1 ( The maximum shrinkage rate is 50 Percent of the original tube diameter. ) Minimum Shrinkage Temp: 158 Degree Fahrenheit Full Shrinkage Temp: 257 Degree Fahrenheit maximum Ambient Temperature:-58 to 302 Degree Fahrenheit Flame Retardance: VW-1 Heat Shrink Tube is used for electrical insulation, strain relief, solder joint protection, group lines marking, corrosion protection. Heat Shrinkable Tube is very suitable for radio circuit control DIY enthusiasts, allowing your circuit control ideas to be perfectly realized.