Heat Shrink Tubing KitHeat 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. Package Included:1x Plastic Box385pcs Heat Shrink Tubes105pcs F1mm Length 40mm Heat Shrink Tubes56pcs F2mm Length 40mm Heat Shrink Tubes70pcs F3mm Length 45mm Heat Shrink Tubes42pcs F4mm Length 45mm Heat Shrink Tubes28pcs F5mm Length 65mm Heat Shrink Tubes21pcs F6mm Length 65mm Heat Shrink Tubes21pcs F8mm Length 90mm Heat Shrink Tubes21pcs F10mm Length 90mm Heat Shrink Tubes21pcs F12mm Length 90mm Heat Shrink Tubes Specification: Color: Black/Red/Green/Yellow/Blue/White/ClearMaterial: PolyolefinFlame Retardance: VW-1Cross-Section Shape: Round or FlatShrinkage Ratio: 2:1 ( The maximum shrinkage rate is 50 Percent of the original tube diameter. )Minimum Shrinkage Temp: 158 Degree FahrenheitFull Shrinkage Temp: 257 Degree Fahrenheit maximumAmbient Temperature:-58 to 302 Degree Fahrenheit 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.